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Journal articles on the topic 'Cyclocondensation'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Mei, Zemin, Haifeng Yu та Peiqiu Liao. "Regioselective Synthesis of Isomeric 3-[1-Substituted Pyrazol-3(5)-yl]indoles from β-Ethylthio-β-indolyl-α,β-unsaturated Ketones". Synthesis 52, № 14 (2020): 2111–20. http://dx.doi.org/10.1055/s-0040-1707999.

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An efficient and highly regioselective synthesis of isomeric 3-[1-substituted pyrazol-3(5)-yl]indoles has been developed by the acid-mediated regioselective cyclocondensation reaction of β-ethyltho-β-indolyl-α,β-unsaturated ketones and monosubstituted hydrazines. In the presence of 1 equivalent of AcOH in refluxing EtOH, the cyclocondensation reaction of β-ethyltho-β- indolyl-α,β-unsaturated ketones with monosubstituted hydrazines yielded 3-(1-substituted pyrazol-5-yl)indoles in excellent yields, while 3-(1-substituted pyrazol-3-yl)indoles were obtained in good yields when the cyclocondensatio

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2

Stadlbauer, Wolfgang, El-Sayed Badawey, Gerhard Hojas, Peter Roschger, and Thomas Kappe. "Malonates in Cyclocondensation Reactions." Molecules 6, no. 4 (2001): 338–52. http://dx.doi.org/10.3390/60400338.

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3

P, Paliwal, Mujalda V, Rao Jetti S, Babu G.N., and S. Jain. "Synthesis and in vitro antimicrobial evaluation of 2,4-diamino-8,8-dimethyl-6-oxo-5-(heteroaryl)-6,7,8,9-tetrahydro-5H-chromeno[2,3-b] pyridine-3-carbonitrile." International Journal of Drug Design and Discovery 3, no. 4 (2025): 930–34. https://doi.org/10.37285/ijddd.3.4.7.

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Four-component one pot cyclocondensation of heteroaromatic aldehyde1, malononitrile2, 5,5-dimethyl-cyclohexane-1,3-dione (dimedone)3 and 1,4-diazabicyclo [2.2.2] octane4 in aqueous-ethanol after initial Knoevenagel condensation, subsequent Michael and final heterocyclization reactions gave substituted and functionalized pyrano(c)chromene derivatives.5 These pyrano(c)chromenes on reaction with malononirile result in the formation of diversely substituted linear tricyclic chromenopyridine6, via cyclocondensation followed by heterocyclization. All the compounds are biologically active against var

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4

Müller, Thomas, та Natascha Breuer. "Consecutive Alkynylation–Michael Addition–Cyclocondensation (AMAC) Multicomponent Syntheses of α-Pyrones and α-Pyridones". Synthesis 50, № 14 (2018): 2741–52. http://dx.doi.org/10.1055/s-0037-1610129.

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A novel consecutive three-component synthesis of α-pyrones is based upon an alkynylation–Michael addition–cyclocondensation (AMAC) sequence, starting from (hetero)aroyl chloride and terminal alkyne to furnish the alkynone which reacts with malonates to give the α-pyrones in moderate to very good yields. By concatenating ammonolysis of the α-pyrones, an alkynylation–Michael addition–cyclocondensation–ammonolysis (AMACA) synthesis of α-pyridones can be conceived. α-Pyridone products with and without ester functionality are obtained in moderate yields.

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5

Kozlov, V. A., K. V. Novikov, T. G. Mokeeva, and S. A. Kuz’mina. "Cyclocondensation of oxoacids with urea." Russian Journal of General Chemistry 83, no. 7 (2013): 1467–68. http://dx.doi.org/10.1134/s1070363213070323.

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6

Sokolov, V. B., A. Yu Aksinenko, T. A. Epishina, T. V. Goreva, and I. V. Martynov. "Cyclocondensation of trifluorolactates with isocyanates." Russian Chemical Bulletin 62, no. 4 (2013): 1020–21. http://dx.doi.org/10.1007/s11172-013-0134-x.

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7

Wang, Yizhong, and Joseph M. Ready. "Cyclocondensation of Amino-propargyl Silanes." Organic Letters 14, no. 9 (2012): 2308–11. http://dx.doi.org/10.1021/ol300724c.

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8

Yu, Haifeng, Wenju Wang, Kehua Wang та Xue Zhang. "Complementary and Regioselective Synthesis of Isomeric 3-[Isoxazol-3(or 5)-yl]indoles from β-Ethylthio-β-indolyl-α,β-unsaturated Ketones". Synthesis 53, № 11 (2021): 1989–99. http://dx.doi.org/10.1055/s-0040-1706658.

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AbstractA simple and efficient method for the complementary and regioselective synthesis of isomeric 3-(isoxazol-5-yl)indoles and 3-(isoxazol-3-yl)indoles has been developed by the regioselective cyclocondensation reaction of β-ethylthio-β-indolyl-α,β-unsaturated ketones and hydroxylamine hydrochloride. It was found that the cyclocondensation reaction in the presence of excess NaOEt in refluxing EtOH gives 3-(isoxazol-5-yl)indoles in good yields, whereas using NaOAc in boiling AcOH gives 3-(isoxazol-3-yl)indoles in good yields.

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9

Sapariya, Nirav H., Beena K. Vaghasiya, Rahul P. Thummar, et al. "Synthesis, characterization, in silico molecular docking study and biological evaluation of a 5-(phenylthio) pyrazole based polyhydroquinoline core moiety." New Journal of Chemistry 41, no. 19 (2017): 10686–94. http://dx.doi.org/10.1039/c7nj01962a.

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10

Dobiaš, Juraj, Marek Ondruš, Gabriela Addová, and Andrej Boháč. "Switchable highly regioselective synthesis of 3,4-dihydroquinoxalin-2(1H)ones from o-phenylenediamines and aroylpyruvates." Beilstein Journal of Organic Chemistry 13 (July 10, 2017): 1350–60. http://dx.doi.org/10.3762/bjoc.13.132.

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3-Acylmethylidene-3,4-dihydroquinoxalin-2(1H)-ones are compounds which possess a wide range of physical and pharmaceutical applications. These compounds can be easily prepared by cyclocondensation of o-phenylenediamines and aroylpyruvates. Unsymmetrically substituted o-phenylenediamines can be obtained form regioisomeric mixtures of 3,4-dihydroquinoxalin-2(1H)-ones. It is often quite difficult to get a pure regioisomer and determine its structure without controlling the reaction selectivity and exploitation of complex NMR techniques (HSQC, NOESY, HMBC). This article examines the regioselectivi

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11

Desai, V. M., A. T. Birajdar, S. P. Patil, R. V. Kupwade, M. B. Deshmukh, and S. S. Patil. "An Expedient Synthesis of 2-Aryl-substituted 2,3-Dihydroquinazolin-4(1H)-ones in Low Transition Temperature Mixture (LTTM) containing SnCl2 and L-Proline." Asian Journal of Chemistry 34, no. 7 (2022): 1886–92. http://dx.doi.org/10.14233/ajchem.2022.23759.

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2,3-Dihydroquinazolin-4(1H)-ones were synthesized in excellent yield in a prepared low transition temperature mixture (LTTM) containing SnCl2 and L-proline using either direct one-pot two-component cyclocondensation of anthranilamide and aldehydes or one-pot three-component cyclocondensation of isatoic anhydride, ammonium acetate and aldehydes. The prepared LTTM is a green solvent, inexpensive, non-toxic and serves a dual function as reusable catalyst and solvent with excellent reaction endorsing medium. The current protocol has several advantages including an easy work up, shorter reaction ti

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12

Knieß, Astrid, Margit Gruner та Roland Mayer. "Reaktionsverhalten von β-Oxo-carbonsäurederivaten der Anthracenreihe bei der Synthese von Pyrazolen / On the Reaction Behavior of ß-Oxo Carbonic Acid Derivatives of the Anthracene Series in Pyrazole Synthesis". Zeitschrift für Naturforschung B 54, № 9 (1999): 1133–37. http://dx.doi.org/10.1515/znb-1999-0908.

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ß-Oxo-1 and 9-anthracenepropionate (6 and 7) reacts with DMF-acetale to enaminones 10 and 11. The reaction of 2-(dimethylamino)methylen-substituted ß-oxo-1 -anthracenepropionate (10) with hydrazines yields 5-(l-anthracenyl)-pyrazol-4-carboxylates (13). In contrast, the cyclocondensation of 3-(9-anthracenyl)-2-(dimethylamino)methylen-3-oxo-propionate (11) with hydrazine hydrochlorides gives 4-(9-anthracenoyl)-5-hydroxy-pyrazoles (14). This is caused by the sterical hindrance of the carbonyl group of the anthracene derivatives in position 9; thus, the cyclocondensation proceeds via reaction of t

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13

Wang, Zikun, Youhua Tao, Zhen Wang, and Jingling Yan. "Synthesis and characterization of poly(N-vinyl-1,2,3-triazole)s derived from monomers obtained by highly efficient Wolff's cyclocondensation." Polymer Chemistry 7, no. 18 (2016): 3172–78. http://dx.doi.org/10.1039/c6py00147e.

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14

Hefner, Jennifer, Alexander Villinger, and Peter Langer. "Synthesis of Homophthalates by [3+3] Cyclocondensation Reactions of 1,3-Bis(silyloxy)-1,3-butadienes with Silylated Methyl 3,5-Dioxohexanoate." Zeitschrift für Naturforschung B 68, no. 7 (2013): 831–35. http://dx.doi.org/10.5560/znb.2013-3020.

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15

Wang, Hao-Yang, Jun-Ting Zhang, Shi-Hao Sun, et al. "Study on the accelerated Gutknecht self-cyclocondensation of amino-sugars under atmospheric pressure chemical ionization conditions." RSC Advances 5, no. 127 (2015): 105079–83. http://dx.doi.org/10.1039/c5ra22331h.

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16

Betcke, Ignaz, Alissa C. Götzinger, Maryna M. Kornet, and Thomas J. J. Müller. "Multicomponent syntheses of pyrazoles via (3 + 2)-cyclocondensation and (3 + 2)-cycloaddition key steps." Beilstein Journal of Organic Chemistry 20 (August 16, 2024): 2024–77. http://dx.doi.org/10.3762/bjoc.20.178.

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Pyrazoles are rarely found in nature but are traditionally used in the agrochemical and pharmaceutical industries, while other areas of use are also actively developing. However, they have also found numerous other applications. The search for new and efficient syntheses of these heterocycles is therefore highly relevant. The modular concept of multicomponent reactions (MCR) has paved a broad alley to heteroaromatics. The advantages over traditional methods are the broader scope and increased efficiency of these reactions. In particular, traditional multistep syntheses of pyrazoles have consid

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17

Pfeiffer, Wolf-Diethard, Helmut Gille, Ehrenfried Bulka, Ashot Saghyan, and Peter Langer. "Cyclocondensations of Substituted Thiosemicarbazides with 2-Bromo- 1,2-diphenylethan-1-one." Zeitschrift für Naturforschung B 68, no. 7 (2013): 823–30. http://dx.doi.org/10.5560/znb.2013-3036.

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The cyclocondensation of 4-methylthiosemicarbazide with 2-bromo-1,2-diphenylethan-1-one in ethanol afforded isomeric 2-methylamino-5,6-diphenyl-6H-3,4-thiadiazine and 2-hydrazono-3- methyl-4,5-diphenyl-2,3-dihydro-1,3-thiazole. A pyrazole was obtained by cyclocondensation and subsequent desulfurization of the thiadiazine when the reaction was carried out in concentrated hydrochloric acid. A chemical proof of the structures has been provided. The product distribution of the cyclizations strongly depends on the substitution pattern of the starting materials, and the cyclizations of methylthiosem

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18

Homaee, Atefeh, Mohammad Bayat, and Hajar Hosseini. "Multicomponent synthesis of novel functionalized spiroindenopyridotriazine-4H-pyrans." RSC Advances 15, no. 9 (2025): 7103–10. https://doi.org/10.1039/d5ra01048a.

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19

Xu, Kang, Ruiqi Yang, Shuang Yang, Cheng Jiang, and Zhenhua Ding. "Hypervalent iodane mediated reactions of N-acetyl enamines for the synthesis of oxazoles and imidazoles." Organic & Biomolecular Chemistry 17, no. 40 (2019): 8977–81. http://dx.doi.org/10.1039/c9ob01895f.

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20

Tawell, Hugh W., William Robinson, Yuqi Li, et al. "Synthesis of fluorinated 3-aminobenzofurans via a tandem S_NAr-cyclocondensation strategy." RSC Advances 15, no. 16 (2025): 12843–53. https://doi.org/10.1039/d5ra02024g.

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21

Valdo, Ana Karoline, Freddy Fernandes Guimarães, and Felipe Terra Martins. "An outstanding cyclocondensation of 2-aminopyrazine." Journal of Molecular Structure 1242 (October 2021): 130723. http://dx.doi.org/10.1016/j.molstruc.2021.130723.

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22

Montgomery, J., and R. Baxter. "Dehydrogenative Cyclocondensation of Dialkylsilanes Providing Oxasilacyclopentenes." Synfacts 2008, no. 11 (2008): 1209. http://dx.doi.org/10.1055/s-0028-1083464.

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23

Popov, I. I. "Cyclocondensation of 2-methylbenzimidazole with acetylacetone." Chemistry of Heterocyclic Compounds 25, no. 12 (1989): 1413. http://dx.doi.org/10.1007/bf00473879.

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24

Dvorikova, R. A., V. N. Khrustalev, A. S. Peregudov, and A. I. Kovalev. "Cyclocondensation of acetylferrocene under ultrasonic conditions." Russian Chemical Bulletin 65, no. 1 (2016): 223–27. http://dx.doi.org/10.1007/s11172-016-1288-0.

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25

El-Feky, Said, and Bashner E. Bayoumy. "Cyclocondensation of 4-Benzyl-1-hydrazinophthalazine." Journal für Praktische Chemie 332, no. 6 (1990): 1041–48. http://dx.doi.org/10.1002/prac.19903320622.

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26

Joshi, Gaurav, Monika Chauhan, Rakesh Kumar, et al. "Cyclocondensation reactions of an electron deactivated 2-aminophenyl tethered imidazole with mono/1,2-biselectrophiles: synthesis and DFT studies on the rationalisation of imidazo[1,2-a]quinoxaline versus benzo[f]imidazo[1,5-a][1,3,5]triazepine selectivity switches." Organic Chemistry Frontiers 5, no. 24 (2018): 3526–33. http://dx.doi.org/10.1039/c8qo00706c.

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27

Silva, Raí G. M., Michael J. V. da Silva, Andrey P. Jacomini та ін. "Development of methodologies for the regioselective synthesis of four series of regioisomer isoxazoles from β-enamino diketones". RSC Advances 8, № 9 (2018): 4773–78. http://dx.doi.org/10.1039/c7ra13343j.

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28

Nielsen, Christian D. T., Wouter J. Mooij, David Sale, Henry S. Rzepa, Jordi Burés, and Alan C. Spivey. "Reversibility and reactivity in an acid catalyzed cyclocondensation to give furanochromanes – a reaction at the ‘oxonium-Prins’ vs. ‘ortho-quinone methide cycloaddition’ mechanistic nexus." Chemical Science 10, no. 2 (2019): 406–12. http://dx.doi.org/10.1039/c8sc04302g.

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Herein we report a combined experimental and computational investigation of the acid catalyzed cyclocondensation reaction between styrenyl homoallylic alcohols and salicylaldehyde to form furanochromanes.

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29

Cheng, Jin-Tang, Xiang-Yu Chen та Song Ye. "N-heterocyclic carbene-catalyzed cyclocondensation of 2-aryl carboxylic acids and enones: highly enantioselective synthesis of δ-lactones". Organic & Biomolecular Chemistry 13, № 5 (2015): 1313–16. http://dx.doi.org/10.1039/c4ob02330g.

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30

Subhedar, Dnyaneshwar D., Mubarak H. Shaikh, Bapurao B. Shingate, Laxman Nawale, Dhiman Sarkar, and Vijay M. Khedkar. "Novel tetrazoloquinoline–thiazolidinone conjugates as possible antitubercular agents: synthesis and molecular docking." MedChemComm 7, no. 9 (2016): 1832–48. http://dx.doi.org/10.1039/c6md00278a.

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31

Gao, Zhong-Hua, Xiang-Yu Chen, Han-Ming Zhang, and Song Ye. "N-Heterocyclic carbene-catalyzed [3+3] cyclocondensation of bromoenals with aldimines: highly enantioselective synthesis of dihydropyridinones." Chemical Communications 51, no. 60 (2015): 12040–43. http://dx.doi.org/10.1039/c5cc04593b.

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32

Pair, Etienne, Vincent Levacher, and Jean-François Brière. "Modified multicomponent Biginelli–Atwal reaction towards a straightforward construction of 5,6-dihydropyrimidin-4-ones." RSC Advances 5, no. 57 (2015): 46267–71. http://dx.doi.org/10.1039/c5ra08792a.

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A modified multicomponent Biginelli condensation with Meldrum's acid affords a straightforward access to 5,6-dihydropyrimidin-4-ones through a domino Knoevenagel-aza-Michael-Cyclocondensation (KaMC) reaction.

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33

Sofi, Firdoos Ahmad, Rohit Sharma, Ravi Rawat, Asit K. Chakraborti, and Prasad V. Bharatam. "Visible light promoted tandem dehydrogenation-deaminative cyclocondensation under aerobic conditions for the synthesis of 2-aryl benzimidazoles/quinoxalines from ortho-phenylenediamines and arylmethyl/ethyl amines." New Journal of Chemistry 45, no. 10 (2021): 4569–73. http://dx.doi.org/10.1039/d0nj03002c.

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Visible light promoted tandem dehydrogenation-deaminative cyclocondensation of arylmethyl/ethyl amines with ortho-phenylenediamines under aerobic conditions is reported for the synthesis of 2-aryl benzimidazoles/quinoxalines.

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34

Zhang, Chun-Lin, Dong-Ling Wang, Kun-Quan Chen, and Song Ye. "N-Heterocyclic carbene-catalyzed [3 + 3] cyclocondensation of bromoenals with hydrazones: highly enantioselective synthesis of dihydropyridazones." Organic & Biomolecular Chemistry 13, no. 46 (2015): 11255–62. http://dx.doi.org/10.1039/c5ob01748c.

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The N-heterocyclic carbene-catalyzed [3 + 3] cyclocondensation of bromoenals and hydrazones is developed to give the corresponding chiral 4,5-dihydropyridazones in good yields with excellent enantioselectivities.

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35

Kankala, Shravankumar, Ranjith Kumar Kankala, Devendar Reddy Kommidi, et al. "Synthesis and anti-cancer evaluation of steroidal diglycoside–pyrazoline hybrids." RSC Adv. 4, no. 76 (2014): 40305–11. http://dx.doi.org/10.1039/c4ra05599c.

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36

Gao, Zhong-Hua, Xiang-Yu Chen, Jin-Tang Cheng, Wei-Lin Liao та Song Ye. "N-Heterocyclic carbene-catalyzed [2+3] cyclocondensation of α-chloroaldehydes with azomethine imines". Chemical Communications 51, № 45 (2015): 9328–31. http://dx.doi.org/10.1039/c5cc01238d.

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The N-heterocyclic carbene-catalyzed enantioselective [2+3] cyclocondensation of α-chloroaldehydes with azomethine imines was developed to give the corresponding pyrazolidinones in good yields with excellent enantioselectivities.

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37

Reddy, Swetha, Srinivas Thadkapally, Mounika Mamidyala, Jagadeesh Babu Nanubolu, and Rajeev S. Menon. "A convenient synthesis of 2-substituted benzofurans from salicylaldehydes." RSC Advances 5, no. 11 (2015): 8199–204. http://dx.doi.org/10.1039/c4ra14948c.

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Base-mediated cyclocondensation of 2-hydroxybenzaldehydes with 3-bromo-1-(arylsulfonyl)propenes and 4-bromocrotonates afforded (E)-2-(2-sulfonylvinyl)benzofurans and (E)-2-benzofuranyl-3-acrylates, respectively.

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38

Amit, P. Tayade, P. Pawar Ramkrushna, V. Khobare Rajiv, B. Mane Chandakant, and P. Tayde Nitin. "ALUM AN EFFICIENT CATALYST FOR SYNTHESIS OF 4-ARYL-3-METHYLISOXAZOLE-5(4H)-ONE DERIVATIVES." International Journal of Advanced Trends in Engineering and Technology (IJATET) 4, no. 2 (2020): 49–51. https://doi.org/10.5281/zenodo.3597044.

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39

Koshchii, I., Yu. Klimko та T. Shamota. "CF3-β-DIKETONES AND TRIMETHYLHALOSILANES AS SYNTHONS FOR TETRAHYDROPYRIMIDINES". Znanstvena misel journal, № 91 (26 червня 2024): 10–22. https://doi.org/10.5281/zenodo.12541088.

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Trimethylchlorosilane, which is an effective promoter and water-condensing agent, was used for the first time in cyclocondensation reactions with substituted ureas and thioureas. By varying the solvent, ratio of reagents, temperature and reaction time, 100% conversion was achieved for the model compounds. The optimal conditions for the reaction were: reaction temperature 20°C, dimethylformamide solvent, reaction time 48 hours, presence of 4 equivalents of Me<sub>3</sub>SiCl. The use of Me<sub>3</sub>SiCl made it possible to introduce a wide range of aromatic and heterocyclic aldehydes, mon

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40

Singh, Ram, and G. Geetanjali. "Synthesis of selected novel 7-methoxycarbonyl-10-substituted isoalloxazines." Journal of the Serbian Chemical Society 71, no. 6 (2006): 575–79. http://dx.doi.org/10.2298/jsc0606575s.

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The synthesis of selected novel 7-methoxycarbonyl-10-substituted isoalloxazines by the cyclocondensation of 2-substituted aminoanilines with alloxan monohydrate under acidic condition in 21-52 % yields, is described.

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41

Mohamadpour, Farzaneh. "The development of imin-based tandem Michael–Mannich cyclocondensation through a single-electron transfer (SET)/energy transfer (EnT) pathway in the use of methylene blue (MB⁺) as a photo-redox catalyst." RSC Advances 12, no. 17 (2022): 10701–10. http://dx.doi.org/10.1039/d2ra01190e.

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A four-component green tandem approach for the metal-free synthesis of polyfunctionalized dihydro-2-oxypyrroles was devised using the Michael–Mannich cyclocondensation of amines, dialkyl acetylenedicarboxylaes, and formaldehyde.

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42

R., K. UPADHYAY, AGARWAL NAMITA, and GUPTA NEELU. "Synthesis of Antibacterial Non-toxic 1,4-Thiazolidinones." Journal of Indian Chemical Society Vol.70, Jun 1993 (1993): 537–38. https://doi.org/10.5281/zenodo.5913930.

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Department of Chemistry, N. R. E C College, Khurja-203 131 <em>Manuscript received 14 March 1991. revised 5 January 1993, accepted 4 March 1993</em> Sixteen 1,4-thiazolidinones, obtained by cyclocondensation of ketoanils (including isomers) with thioglycolic acid, have been characterised for their non-toxic and antibacterial properties.

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43

Mollova, Yordanka, Plamen Angelov, and Pavel Yanev. "3-Carbamoylmethyl-Indole-1-Carboxylic Acid Ethyl Ester." Molbank 2022, no. 1 (2022): M1324. http://dx.doi.org/10.3390/m1324.

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3-Carbamoylmethyl-Indole-1-Carboxylic Acid Ethyl Ester (an ethoxycarbonyl derivative of indole-3-acetamide) is obtained by Friedel–Crafts type cyclocondensation of γ-functionalized acetoacetamide in neat polyphosphoric acid.

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44

Das, Archana M., and Manash P. Hazarika. "Synthesis of some novel steroidal 1,2,4,5-tetraoxanes." RSC Advances 5, no. 26 (2015): 19818–22. http://dx.doi.org/10.1039/c5ra00169b.

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A facile synthesis of A-ring manipulated C-20 methyl carboxylate steroid derivative with unsymmetrical dispiro 1,2,4,5-tetraoxanes has been focused herein via acid catalyzed cyclocondensation of bis-epidioxy ketone.

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45

Kicsák, Máté, Attila Mándi, Szabolcs Varga, et al. "Tricyclanos: conformationally constrained nucleoside analogues with a new heterotricycle obtained from a d-ribofuranose unit." Organic & Biomolecular Chemistry 16, no. 3 (2018): 393–401. http://dx.doi.org/10.1039/c7ob02296d.

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Nucleoside analogues having a new N,O-containing tricycle in place of the ribose unit have been prepared by a diastereoselective cyclocondensation of Tris and dialdehydes obtained from ribofuranosyl nucleosides.

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46

Jafari, Behzad, Sayfidin Safarov, Muattar Khalikova, Peter Ehlers, and Peter Langer. "Synthesis of 1,3,4-Thiadiazolo[2′,3′:2,3]imidazo[4,5-b]indoles." Synlett 30, no. 15 (2019): 1791–94. http://dx.doi.org/10.1055/s-0039-1690147.

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Hitherto unknown thiadiazolo[2′,3′:2,3]imidazo[4,5-b]indoles were synthesized for the first time by base-mediated cyclocondensation, bromination, and subsequent cyclization by two-fold Buchwald–Hartwig reactions.

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47

Liang, Zhi-Qin, Dong-Ling Wang, Chun-Lin Zhang, and Song Ye. "Enantioselective N-heterocyclic carbene-catalyzed synthesis of saccharine-derived dihydropyridinones with cis-selectivity." Organic & Biomolecular Chemistry 14, no. 27 (2016): 6422–25. http://dx.doi.org/10.1039/c6ob01040g.

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The N-heterocyclic carbene-catalyzed [2 + 4] cyclocondensation of α-chloroaldehydes and saccharine-derived 1-azadienes was developed, giving dihydropyridinones in good yields with exclusive cis-selectivities and excellent enantioselectivities.

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48

Azizi, Kobra, Meghdad Karimi, Hamid Reza Shaterian, and Akbar Heydari. "Ultrasound irradiation for the green synthesis of chromenes using l-arginine-functionalized magnetic nanoparticles as a recyclable organocatalyst." RSC Adv. 4, no. 79 (2014): 42220–25. http://dx.doi.org/10.1039/c4ra06198e.

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A convenient synthesis of chromenes via cyclocondensation of α- or β-naphthol, malononitrile and aromatic aldehydes is developed in the presence of l-arginine-immobilized magnetic nanoparticles under ultrasound irradiation.

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49

Makhmudiyarova, Nataliya N., Irina R. Ishmukhametova, Kamil R. Shangaraev, et al. "Catalytic synthesis of benzannelated macrocyclic di- and triperoxides based on phenols." New Journal of Chemistry 45, no. 4 (2021): 2069–77. http://dx.doi.org/10.1039/d0nj05511e.

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An efficient method for the synthesis of benzannelated macrocyclic di- and triperoxides by cyclocondensation of aromatic compounds with bis-hydroperoxides and formaldehyde in the presence of lanthanide catalysts has been developed.

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50

Chivers, Tristram, and Risto S. Laitinen. "Insights into the formation of inorganic heterocycles via cyclocondensation of primary amines with group 15 and 16 halides." Dalton Transactions 46, no. 5 (2017): 1357–67. http://dx.doi.org/10.1039/c6dt04477h.

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The cyclocondensation reaction of primary amines with pnictogen and chalcogen halides is a major preparative route for the generation of inorganic heterocycles involving a Group 15 or 16 element linked to nitrogen.

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