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Journal articles on the topic 'Dihydropyrrols'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Bach, Thorsten, and Harm Brummerhop. "An expedient synthesis ofN-acceptor-substituted 2,3-dihydropyrrols from the corresponding 2-pyrrolidinones." Journal für praktische Chemie 341, no. 3 (1999): 312–15. http://dx.doi.org/10.1002/(sici)1521-3897(199904)341:3<312::aid-prac312>3.0.co;2-2.

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2

Bach, Thorsten, and Harm Brummerhop. "ChemInform Abstract: An Expedient Synthesis of N-Acceptor-Substituted 2,3-Dihydropyrrols from the Corresponding 2-Pyrrolidinones." ChemInform 30, no. 31 (2010): no. http://dx.doi.org/10.1002/chin.199931137.

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3

Bach, Thorsten, and Harm Brummerhop. "Ungewöhnliche faciale Diastereoselektivität in der Paternò-Büchi-Reaktion eines chiralen Dihydropyrrols – eine kurze Totalsynthese von (+)-Preussin." Angewandte Chemie 110, no. 24 (1998): 3577–79. http://dx.doi.org/10.1002/(sici)1521-3757(19981217)110:24<3577::aid-ange3577>3.0.co;2-3.

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4

Saalfrank, Rolf W., Jochen Nachtrab, and Stephan Reck. "Synthese und Aggregatbildung eines 5-Hydroxy-2,5-dihydropyrrols. Enantiomerenreine, eindimensionale Stränge durch Wasserstoffbrückenbindungen und chiroselektive Selbstorganisation/Synthesis and Aggregation of a 5-H ydroxy-2,5-dihydropyrrole. Enantiomerically Pure, One-dimensional Strands via Hydrogen Bonds and Chiroselective Self Organization." Zeitschrift für Naturforschung B 54, no. 2 (1999): 179–86. http://dx.doi.org/10.1515/znb-1999-0205.

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Reaction of dimethyl 1,3-acetonedicarboxylate 8 with oxalylchloride 2 and magnesium chloride as catalyst yielded 2,3-dioxo-2,3-dihydrofuran 9, which is in equilibrium with tautomer 10 (9:10 = 1:2). Addition of thionyl chloride to a mixture of 9/10 afforded 3-chloro-2(5H)-furanone 11. The structure of 11 was unequivocally established by X-ray diffraction, which indirectly proved the structure of 10 as well. Ring opening of 11 by nucleophilic attack with benzylamine 14 in C2-position and subsequent recyclization led to racemic 3-chloro-5-hydroxy-2-oxo-2,5-dihydropyrrole 15. According to a single

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5

Reissig, Hans-Ulrich, Arndt Hausherr, and Reinhold Zimmer. "Additions of Carbohydrate-Derived Alkoxyallenes to Imines and Subsequent Reactions to Enantiopure 2,5-Dihydropyrrole Derivatives." Synthesis 51, no. 02 (2018): 486–99. http://dx.doi.org/10.1055/s-0037-1609942.

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The additions of six alkoxyallenes bearing carbohydrate-derived chiral auxiliaries to imines were systematically studied. The reactions of three lithiated 1-alkoxypropa-1,2-dienes with an N-tosyl imine revealed that the diacetone fructose-derived auxiliary provided the highest diastereoselectivity of 91:9. The preferred absolute configuration of the newly formed stereogenic center was determined by subsequent ozonolysis of the allene moiety, transesterification and comparison with literature data. The analogous reactions of three axially chiral 3-nonyl-substituted 1-alkoxyallenes with these au

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6

Singh, Mandavi, Shyam Babu Singh, Shahin Fatma, Preyas Ankit, and Jagdamba Singh. "Development of five membered heterocyclic frameworks via [3+2] cycloaddition reaction in an aqueous micellar system." New J. Chem. 38, no. 7 (2014): 2756–59. http://dx.doi.org/10.1039/c4nj00325j.

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A series of novel dihydropyrrolo[2,1-a]isoquinolines and dihydropyrrolo[1,2-a]quinolines have been synthesized from isoquinolines/quinolines, various substituted phenacyl bromides and substituted dialkylacetylenedicarboxylates via [3+2] cycloaddition reaction.

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7

Guesmi, A., and N. Ben Hamadi. "Remarkable electronic effect on the total stereoselectivity of the cycloaddition reaction of arylnitrile oxides with pyrrol-2-one derivatives." Heterocyclic Communications 25, no. 1 (2019): 60–65. http://dx.doi.org/10.1515/hc-2019-0014.

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AbstractThe regiospecific 1,3-dipolar cycloaddition of 1,5-dihydropyrrol-2-one and arylnitrile oxides derivatives have been investigated. The asymmetric induction expected by the chiral centre of the 5-hydroxy-3-methyl-1,5-dihydropyrrol-2-one derivatives was very effective, single diastereoisomers anti-3 was formed. The diastereoselectivity was linked to the destabilization of the syn transition state as a result of the electrostatic repulsion between the hydroxy group of the dihydropyrrol-2-one derivatives and the atom oxygen of the dipole.

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8

Kreher, Richard P., та Gerald Dyker. "Struktur und Reaktivität von isoanellierten heterocyclischen Systemen mit Anπ- und (4n+2)π-Elektronen, XII [1]. 2-tert-Butyl-4-methyl-2,4-dihydropyrrolo[3,4-b]indole: Tricyclische Hetarene mit isoanellierten Pyrrolringen / Structure and Reactivity of Isoannelated Heterocyclic Systems with 4nπ- and (4n+2)π-Electrons, XII [1] 2-terr-Butyl-4-methyl-2,4-dihydropyrrolo[3,4-b]indoles: Tricyclic Hetarenes with Isoannelated Pyrrole Rings". Zeitschrift für Naturforschung B 42, № 4 (1987): 473–77. http://dx.doi.org/10.1515/znb-1987-0414.

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2-tert-Butyl-4-methyl-2,4-dihydropyrrolo[3,4-b]indole (4a) has been prepared via selective reduction of 2-rm-butyl-4-methyl-2,4-dihydropyrrolo[3,4-b]indol-l(2H)-one or -3(2H)-one 5 and 6 with diisobutylaluminiumhydride. The same precursors 5 and 6 can be transformed into 2-tert-butyl-4-methyl-2,4-dihydropyrrolo[3,4-b]indoles (4b) and (4c) bearing a methoxy group in 1- or 3-position via a two step procedure consisting in O-alkylation and CH-deprotonation. NMR Investigations afford an insight into the structure of the stable tricyclic hetarenes.

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9

Sonesson, Clas, and Anders Hallberg. "Preparation of N-Formyl- and N-carbomethoxy-2,3-dihydropyrroles by palladium-catalyzed isomerization of the corresponding N-acyl-2,5-dihydropyrrole." Tetrahedron Letters 36, no. 25 (1995): 4505–6. http://dx.doi.org/10.1016/0040-4039(95)00770-d.

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10

Guo, Yong En, Xiao Guang Niu, Cai Ju Zhou, Jie Chu, Wei Wei Xu, and Guo Zhen Fang. "Design and Preparation of 1H-3, 4-Dihydropyrrolo[1,2-a] Pyrazin-1-One via 1H-3,4-Dihydropyrrolo[1,2-C] [1,4] Oxazin-1-One Route." Advanced Materials Research 343-344 (September 2011): 1242–47. http://dx.doi.org/10.4028/www.scientific.net/amr.343-344.1242.

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With 2-pyrrolyltrichloroacetone as major starting material, unreported 1H-3,4-dihydropyrrolo- [1,2-a]pyrazin-1-one was prepared successively by its monoesterification with ethylene glycol, bromine displacement of hydroxy group, cyclization to lactone and its amidation. Unreported 7-aroyl-1H-3,4-dihydropyrrolo[1,2-c][1,4]oxazin-1-one compounds were also synthesized in turn by 2-pyrrolyl-trichloroacetone’s Friedel-Crafts acylation and cyclization. Their structures were characterized by IR, 1H NMR, 13C NMR, MS, HRMS, etc.

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11

SONESSON, C., and A. HALLBERG. "ChemInform Abstract: Preparation of N-Formyl- and N-Carbomethoxy-2,3-dihydropyrroles by Palladium-Catalyzed Isomerization of the Corresponding N-Acyl-2,5- dihydropyrrole." ChemInform 26, no. 40 (2010): no. http://dx.doi.org/10.1002/chin.199540135.

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12

Chen, Yi, De X. Zeng, Nan Xie, and Yi Z. Dang. "Study on Photochromism of Diarylethenes with a 2,5-Dihydropyrrole Bridging Unit: A Convenient Preparation of 3,4-Diarylpyrroles from 3,4-Diaryl-2,5-dihydropyrroles." Journal of Organic Chemistry 70, no. 13 (2005): 5001–5. http://dx.doi.org/10.1021/jo050236r.

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13

Liao, Shao Han, Dai Hua Hu, Ai Ling Wang, and De Peng Li. "Novel 5,6-Dihydropyrrolo[2,1-a]isoquinolines as Scaffolds for Synthesis of Lamellarin Analogues." Evidence-Based Complementary and Alternative Medicine 2011 (2011): 1–6. http://dx.doi.org/10.1155/2011/103425.

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As core skeletons of lamellarins: 5,6-Dihydropyrrolo[2,1-a]isoquinolines are one of the important alkaloids that exhibit significant biological activities, in this study, an efficient synthetic route was described for two novel compounds, 5,6-dihydropyrrolo[2,1-a]isoquinolinesIandII. CompoundIwas synthesized from isovanillin with 28.3% overall yield by a six-step reaction whileIIfrom 2-(3,4-dimethoxyphenyl) ethanamine was with 61.6% overall yield by a three-step reaction. And the structures of these two compounds were confirmed by means of IR spectrum,1H NMR,13C NMR, MS, HRMS, and melting poin

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14

Belguedj, Roumaissa, Sofiane Bouacida, Hocine Merazig, Ali Belfaitah, Aissa Chibani, and Abdelmalek Bouraiou. "Synthesis and crystal structures of three novel benzimidazole/benzoindolizine hybrids." Zeitschrift für Naturforschung B 71, no. 3 (2016): 231–39. http://dx.doi.org/10.1515/znb-2015-0164.

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AbstractThree benzoindolizine derivatives, 1, 2, and 3, were obtained via 1,3-dipolar cycloaddition. The reaction of 1-(2′-benzimidazolylmethyl)isoquinolinium ylides with dimethyl acetylenedicarboxylate gave a mixture of pyrrolo[2,1-a]isoquinoline-1,2-dicarboxylate (1) and 1,10b-dihydropyrrolo[2,1-a]isoquinoline-1,2-dicarboxylate (2) derivatives containing a benzimidazole moiety. The reaction of this isoquinolinium N-ylide with dimethyl maleate gave an unexpected 2,3-dihydropyrrolo[2,1-a]isoquinoline-1,2-dicarboxylate (3). The structures of all reported compounds have been examined by X-ray cr

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15

Wang, Wenhui, Jinwei Sun, Huayou Hu, and Yun Liu. "Copper-catalyzed aerobic cyclizations of tetrahydroisoquinolines with bromoketones and alkenes for the synthesis of 5,6-dihydropyrrolo[2,1-a]isoquinolines." Organic & Biomolecular Chemistry 16, no. 10 (2018): 1651–58. http://dx.doi.org/10.1039/c7ob03048g.

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16

Seyrani, Hassan, Sorour Ramezanpour, Aref Vaezghaemi, and Farzad Kobarfard. "A sequential Ugi–Smiles/transition-metal-free endo-dig Conia–ene cyclization: the selective synthesis of saccharin substituted 2,5-dihydropyrroles." New Journal of Chemistry 45, no. 34 (2021): 15647–54. http://dx.doi.org/10.1039/d1nj01159f.

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17

Huang, Zhusheng, Zonghao Dai, Jin Zhu, Fulai Yang, and Qingfa Zhou. "Synthesis of functionalized 2,5-dihydropyrrole derivatives via a convenient [3 + 2] annulation of azomethine ylides with allenoates." Organic & Biomolecular Chemistry 16, no. 36 (2018): 6638–46. http://dx.doi.org/10.1039/c8ob01946k.

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18

Wang, Ruijia, Yuejun OuYang, Chonghui Xu, et al. "Hypervalent iodine-triggered transformation of homopropargyl sulfonamides into dihalo-2,3-dihydropyrroles." Organic & Biomolecular Chemistry 15, no. 4 (2017): 796–800. http://dx.doi.org/10.1039/c6ob02536f.

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19

Wang, Dong, Yu Fan, Peng Yu, and Laurent Désaubry. "Recent advances in the synthesis of 2,3-dihydropyrroles." Chemical Communications 56, no. 42 (2020): 5584–92. http://dx.doi.org/10.1039/d0cc02096f.

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20

Basirat, Narjes, Seyed Sajad Sajadikhah, and Abdolkarim Zare. "Multi-component synthesis of piperidines and dihydropyrrol-2-one derivatives catalyzed by a dual-functional ionic liquid." Journal of Chemical Research 44, no. 1-2 (2019): 20–24. http://dx.doi.org/10.1177/1747519819883881.

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N,N,N’, N’-tetramethyl- N,N’-bis(sulfo)ethane-1,2-diaminium mesylate ([TMBSED][OMs]2) was employed for the synthesis of piperidines and dihydropyrrol-2-ones via one-pot multi-component reactions in simple and green processes. This pseudo five-component reaction of aromatic aldehydes, anilines and alkyl acetoacetates was carried out under reflux conditions in ethanol to afford substituted piperidines. Also, dihydropyrrol-2-one derivatives were synthesized by means of four-component reactions of various amines, dialkyl acetylenedicarboxylates and formaldehyde in ethanol at room temperature. The

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21

Zabaleta, Nagore, Uxue Uria, Efraim Reyes, Luisa Carrillo, and Jose L. Vicario. "Ion-pairing catalysis in the enantioselective addition of hydrazones to N-acyldihydropyrrole derivatives." Chemical Communications 54, no. 64 (2018): 8905–8. http://dx.doi.org/10.1039/c8cc05311a.

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22

Sun, Zhen, Zheng Li, and Wei-Wei Liao. "An organocatalytic hydroalkoxylation/Claisen rearrangement/Michael addition tandem sequence: divergent synthesis of multi-substituted 2,3-dihydrofurans and 2,3-dihydropyrroles from cyanohydrins." Green Chemistry 21, no. 7 (2019): 1614–18. http://dx.doi.org/10.1039/c8gc03978j.

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23

Chung, Min-Ching, Yung-Hsiang Chan, Wen-Jung Chang, and Duen-Ren Hou. "Synthesis of 2,3-dihydro-1H-pyrroles by intramolecular cyclization of N-(3-butynyl)-sulfonamides." Organic & Biomolecular Chemistry 15, no. 17 (2017): 3783–90. http://dx.doi.org/10.1039/c7ob00528h.

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24

Tao, Mengna, Wenbo Li, and Junliang Zhang. "Pd/Xiang-Phos-catalyzed enantioselective intermolecular carboheterofunctionalization of norbornene and norbornadiene." Chemical Communications 56, no. 86 (2020): 13125–28. http://dx.doi.org/10.1039/d0cc04996d.

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25

Banfield, JE, GD Fallon, and BM Gatehouse. "Heterocyclic-Derivatives of Guanidine. VI. Formation and X-Ray Structure Determination of 2-Dimethylamino-7,8-diphenyl-4,6-dihydropyrrolo[1,2-a]pyrimidine-4,6-dione." Australian Journal of Chemistry 40, no. 5 (1987): 1003. http://dx.doi.org/10.1071/ch9871003.

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The structure N-(2-dimethylamino-4-oxo-7,8-diphenyl-4,6-dihydropyrrolo [l,2-a]pyrimidi n-6-yl-idene)acetamide (3) is proposed for a compound derived from the action of ketene on 2-(2-imino- 3,4-diphenyl-2H-pyrrol-5-yl)-1,1,3-trimethylguanidine (1; R1 = R2 = R3 = Me) on the basis of the crystal structure of its hydrolysis product, the oxo-compound 2-dimethylamino-7,8-diphenyl-4,6-dihydropyrrolo[l,2-a]pyrimidine-4,6-dione (4), the structure of which was determined by X-ray analysis. A lower homologue of (3), N-(2-methylamino-4-oxo-7,8-diphenyl-4,6-dihydro- pyrrolo[l,2-a]pyrimidin-6-ylidene)aceta

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26

Yu, Yong-Fei, Chao Shu, Bo Zhou, Jian-Qiao Li, Jin-Mei Zhou, and Long-Wu Ye. "Efficient and practical synthesis of enantioenriched 2,3-dihydropyrroles through gold-catalyzed anti-Markovnikov hydroamination of chiral homopropargyl sulfonamides." Chemical Communications 51, no. 11 (2015): 2126–29. http://dx.doi.org/10.1039/c4cc09245g.

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A direct gold-catalyzed anti-Markovnikov hydroamination of chiral homopropargyl sulfonamides has been developed. A range of enantioenriched 2,3-dihydropyrroles are readily accessed by utilizing this approach.

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27

Cui, Hai-Lei. "FeCl2 catalyzed direct modification of dihydropyrrolo[2,1-a]isoquinolines with phenols." Organic & Biomolecular Chemistry 18, no. 21 (2020): 4085–89. http://dx.doi.org/10.1039/d0ob00917b.

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28

Wang, Dong, Linna Li, Hairong Feng, et al. "Catalyst-free three-component synthesis of highly functionalized 2,3-dihydropyrroles." Green Chemistry 20, no. 12 (2018): 2775–80. http://dx.doi.org/10.1039/c8gc00987b.

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29

Meng, Ke, Jingzhao Xia, Yanzhao Wang, Xinghua Zhang, Guoqiang Yang, and Wanbin Zhang. "Ir/BiphPHOX-catalyzed asymmetric hydrogenation of 3-substituted 2,5-dihydropyrroles and 2,5-dihydrothiophene 1,1-dioxides." Organic Chemistry Frontiers 4, no. 8 (2017): 1601–5. http://dx.doi.org/10.1039/c7qo00248c.

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An efficient asymmetric hydrogenation of 3-substituted 2,5-dihydropyrroles and 2,5-dihydrothiophene 1,1-dioxides was developed using an Ir catalyst with an axially flexible chiral phosphine-oxazoline ligand.

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30

Tang, Fei-Fei, Wu-Lin Yang, Xingxin Yu, and Wei-Ping Deng. "Cu(OAc)2/FOXAP complex catalyzed construction of 2,5-dihydropyrrole derivatives via asymmetric 1,3-dipolar cycloaddition of azomethine ylides to ethynyl ketones." Catalysis Science & Technology 5, no. 7 (2015): 3568–75. http://dx.doi.org/10.1039/c5cy00422e.

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Cu(OAc)<sub>2</sub>/FOXAP catalyzed asymmetric 1,3-dipolar cycloaddition of azomethine ylides to ethynyl ketones, affording 2,5-dihydropyrroles in good to excellent yields and excellent enantioselectivities.

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31

Chang, Li, Guang-Yu Zhu, Ting Yang, Xiao-Li Zhao, Min Shi, and Mei-Xin Zhao. "Organocatalytic asymmetric formal [3 + 2] cycloaddition reaction of isocyanoacetates with saccharin-derived 1-azadienes." Organic & Biomolecular Chemistry 19, no. 16 (2021): 3687–97. http://dx.doi.org/10.1039/d1ob00115a.

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Organocatalyzed asymmetric formal [3 + 2] cycloaddition of α-isocyanoacetates with saccharin-derived 1-azadienes was developed, providing expeditious access to directly linked benzo[d]isothiazole 1,1-dioxide-dihydropyrroles.

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32

Jacoby, Denis, Jean Pierre Celerier, Gjergi Haviari, Huguette Petit, and Gérard Lhommet. "Regiospecific Synthesis of Dihydropyrroles." Synthesis 1992, no. 09 (1992): 884–87. http://dx.doi.org/10.1055/s-1992-26252.

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33

He, Yinghui, Chang Guo, Bin Sun, Jesse Quinn, and Yuning Li. "(3E,7E)-3,7-Bis(2-oxoindolin-3-ylidene)-5,7-dihydropyrrolo[2,3-f]indole-2,6(1H,3H)-dione based polymers for ambipolar organic thin film transistors." Chemical Communications 51, no. 38 (2015): 8093–96. http://dx.doi.org/10.1039/c5cc01021g.

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34

Race, Nicholas J., Adele Faulkner, Gabriele Fumagalli, et al. "Enantioselective Narasaka–Heck cyclizations: synthesis of tetrasubstituted nitrogen-bearing stereocenters." Chemical Science 8, no. 3 (2017): 1981–85. http://dx.doi.org/10.1039/c6sc04466b.

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35

Jiang, Xue-Fei, Hao Tan, and Hai-Lei Cui. "FeCl3 mediated dimerization of dihydropyrrolo[2,1-a]isoquinolines and chlorination of tetrasubstituted pyrroles." Organic & Biomolecular Chemistry 18, no. 4 (2020): 660–65. http://dx.doi.org/10.1039/c9ob02607j.

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We have developed a mild FeCl<sub>3</sub>-mediated dimerization of dihydropyrrolo[2,1-a]isoquinolines through oxidative homocoupling (35–>99% yield) and chlorination of tetrasubstituted pyrroles (18–70% yield).

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36

Chao, Di, Tong-Xin Liu, Nana Ma, et al. "Silver(i)-mediated three-component annulation reaction of [60]fullerene, sulfonylhydrazones, and nitriles: leading to diverse disubstituted [60]fullerene-fused dihydropyrroles." Chemical Communications 52, no. 5 (2016): 982–85. http://dx.doi.org/10.1039/c5cc07218b.

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A novel Ag(i)-mediated three-component annulation reaction of C<sub>60</sub>, sulfonylhydrazones, and nitriles is developed for the synthesis of diverse disubstituted C<sub>60</sub>-fused dihydropyrroles.

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37

Zhang, Yan-Yan, Yin Wei, Xiang-Ying Tang, and Min Shi. "Dual-role of PtCl2 catalysis in the intramolecular cyclization of (hetero)aryl-allenes for the facile construction of substituted 2,3-dihydropyrroles and polyheterocyclic skeletons." Chemical Communications 53, no. 44 (2017): 5966–69. http://dx.doi.org/10.1039/c7cc01684k.

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A novel PtCl<sub>2</sub>-catalyzed cyclization of (hetero)aryl-allenes has been developed, providing controllable and facile synthesis of substituted 2,3-dihydropyrroles and polyheterocyclic skeletons in moderate to good yields.

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38

Lee, Jeong Hwa, Seok Hyun Yoon, Seonghyeon Nam, and Ikyon Kim. "One-pot three-component coupling access to 1,2-dihydropyrrolo[1,2-a]pyrazine-1-phosphonates: multi-functionalization of a pyrazine unit." Organic & Biomolecular Chemistry 19, no. 27 (2021): 6066–84. http://dx.doi.org/10.1039/d1ob00885d.

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A highly efficient domino one-pot three-component Kabachnik–Fields coupling-intramolecular dehydrative cyclization process allowed facile access to 1,2-dihydropyrrolo[1,2-a]pyrazine-1-phosphonates with a densely-functionalized pyrazine unit.

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39

Purba, Prioti Choudhury, Soumalya Bhattacharyya, Manoranjan Maity, Sujay Mukhopadhyay, Prodip Howlader, and Partha Sarathi Mukherjee. "Linkage induced enhancement of fluorescence in metal–carbene bond directed metallacycles and metallacages." Chemical Communications 55, no. 57 (2019): 8309–12. http://dx.doi.org/10.1039/c9cc04444b.

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Four new metal–carbene based metallacycles and metallocages have been obtained using non-AIE active 1,4-dihydropyrrolo[3,2-b]pyrrole based imidazolium ligands. These final assemblies show linkage induced enhanced emission via rigidification.

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40

Elghamry, Ibrahim, and Dietrich Dopp. "A New Asymmetric Photoisomerization of 2,3-Dihydropyrrolo[1,2-b]benzisothiazole 5,5-Dioxides." Journal of the Korean Chemical Society 54, no. 6 (2010): 727–30. http://dx.doi.org/10.5012/jkcs.2010.54.6.727.

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41

Choi, Eun Joung, та Seung Bum Park. "Unique photophysical properties of 9-styryl-1,2-dihydropyrrolo[3,4-β]indolizin-3-one and its efficient synthesis via direct C–H activation". Organic & Biomolecular Chemistry 13, № 18 (2015): 5202–8. http://dx.doi.org/10.1039/c5ob00551e.

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A styryl Seoul-Fluor (SF) skeleton was rationally designed by introducing an olefin unit at the C-9 of 1,2-dihydropyrrolo[3,4-β]indolizin-3-one via regioselective direct C–H activation, affording average 39 nm of bathochromic shift.

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42

Matveeva, Maria, Tatiana Borisova, Alexander Titov та ін. "Domino Reactions of 1-Aroyl-3,4-dihydroisoquinolines with α,β-Unsaturated Aldehydes". Synthesis 49, № 23 (2017): 5251–57. http://dx.doi.org/10.1055/s-0036-1588486.

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An efficient synthesis of pyrrolo[2,1-a]isoquinolines by a domino reaction from a variety of 3,4-dihydropyrrolo[2,1-a]isoquinolines and α,β-unsaturated aldehydes in the absence of catalyst in good yields under microwave irradiation, is reported.

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43

Jiang, Bo, and Min Shi. "Rhodium(ii)-catalyzed intermolecular [3 + 2] annulation of N-vinyl indoles with N-tosyl-1,2,3-triazoles via an aza-vinyl Rh carbene." Organic Chemistry Frontiers 4, no. 12 (2017): 2459–64. http://dx.doi.org/10.1039/c7qo00703e.

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This study opens up a new synthetic approach for the construction of various functionalized indoles having a dihydropyrrole moiety from the Rh(ii)-catalyzed annulation of N-vinyl indoles with 4-aryl-N-tosyl-1,2,3-triazoles under mild conditions.

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44

Pinna, Gérard Aimè, Mario Sechi, Giuseppe Paglietti, and Maria Antonietta Pirisi. "Addition reactions of Acetylenic Esters to 6,7-Dihydrobenzo[B]Furan-4(5H)-One, 6,7-Dihydroindol-4(5H)-One, 5,6-Dihydrobenzo[B]Furan-7(6H)-One and 5,6-Dihydroindol-7(6H)-One Ketoximes. Formation of Reduced Furo[G]- and Pyrrolo[G]-Indoles." Journal of Chemical Research 2003, no. 3 (2003): 117–20. http://dx.doi.org/10.3184/030823403103173426.

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Thermal rearrangement of 6,7-dihydrobenzo[ b]furan-4(5 H)-one and 4,5,6,7-tetrahydroindol-4-one 4(7)- O-( E)-(1,2-dimethoxycarbonylvinyl)ketoximes gave 4,5-dihydrofuro[2,3 g]- and 4,5-dihydropyrrolo[2,3 g]- and [3,2- g] indoles, three novel tricyclic systems

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45

Arupula, Sanjeeva Kumar, Santosh K. Gudimella, Soumitra Guin, Shaikh M. Mobin, and Sampak Samanta. "Chemoselective cyclization of N-sulfonyl ketimines with ethenesulfonyl fluorides: access to trans-cyclopropanes and fused-dihydropyrroles." Organic & Biomolecular Chemistry 17, no. 13 (2019): 3451–61. http://dx.doi.org/10.1039/c9ob00433e.

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A stereo- and chemoselective ring closing reaction of N-sulfonyl ketimines with ethene sulfonyl fluorides promoted by DBU is reported. This selective C–C vs. C–N bond cyclization process delivers to trans-cyclopropanes (dr up to ≤99 : 1) and fused-dihydropyrroles.

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46

Dhar, Abhishek, Nadavala Siva Kumar, Mohammad Asif та Rohit L. Vekariya. "Fabrication of D–π–A sensitizers based on different donors substituted with a dihydropyrrolo[3,4-c]pyrrole-1,4-dione bridge for DSSCs: influence of the CDCA co-absorbent". New Journal of Chemistry 42, № 14 (2018): 12024–31. http://dx.doi.org/10.1039/c8nj00847g.

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The effect of co-absorbance on the performance of DSSC devices with a new design of dimer sensitizers possessing a 2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (DPP) bridge and various donor groups (carbazole, diphenyl amine, indole) are reported in the present work.

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47

Noda, Kyoko, Naoko Terasawa, and Masatsune Murata. "Formation scheme and antioxidant activity of a novel Maillard pigment, pyrrolothiazolate, formed from cysteine and glucose." Food & Function 7, no. 6 (2016): 2551–56. http://dx.doi.org/10.1039/c5fo01625h.

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We recently identified 6-hydroxy-3[R],7a[S]-dimethyl-7-oxo-2,3-dihydropyrrolo[2,1-b]thiazole-3-calboxylic acid, a novel pyrrolothiazole derivative carrying a carboxy group and named pyrrolothiazolate, as a Mallard pigment formed from l-cysteine and d-glucose.

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48

Xing, Siyang, Junsuo Guo, Yuhan Wang, Chenyu Wang, Kui Wang, and Bolin Zhu. "General and efficient synthesis of 1,2-dihydropyrrolo[3,4-b]indol-3-ones via a formal [3 + 2] cycloaddition initiated by C–H activation." Organic Chemistry Frontiers 7, no. 24 (2020): 4057–63. http://dx.doi.org/10.1039/d0qo00922a.

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A [Cp*RhCl<sub>2</sub>]<sub>2</sub>-catalyzed formal [3 + 2] cycloaddition involving a sequential coupling reaction initiated by C–H activation and aza-Michael addition has been developed for the general and efficient synthesis of 1,2-dihydropyrrolo[3,4-b]indol-3-ones.

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49

Borovskoy, Valery A., Sergey A. Komykhov, Vladimir I. Musatov, Svetlana V. Shishkina, Oleg V. Shishkin, and Sergey M. Desenko. "Unusual reaction of 2-(aminomethyl)benzimidazole with chalcones: Synthesis of new aryl-substituted pyrrolines." Collection of Czechoslovak Chemical Communications 74, no. 9 (2009): 1403–10. http://dx.doi.org/10.1135/cccc2009018.

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The reaction of 2-(aminomethyl)benzimidazole (1) with chalcones 2a–2e leads to formation of 3,5-diaryl-2-benzimidazol-2-yl-4,5-dihydropyrroles 3a–3e. The trans orientation of benzimidazol-2-yl and 3-aryl substituents in 3a–3e was established by X-ray analysis of 3e.

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50

Liao, Hui, and Qiuhua Zhu. "Water–DMSO-promoted one-pot synthesis of two new series of dihydropyrrolo[2,3-h]quinolines." Organic & Biomolecular Chemistry 18, no. 2 (2020): 215–19. http://dx.doi.org/10.1039/c9ob02342a.

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Two new series of dihydropyrrolo[2,3-h]quinolines 4 and 6 were synthesized via a three-component reaction synergistically activated by water and DMSO, and new pyrrolo[2,3-h]quinolines 10 can be obtained by oxidation of 4 using Cu(NO<sub>3</sub>)<sub>2</sub> as oxidant.

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