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Journal articles on the topic '-[a]pyrimidin-4-ones'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Guo, Cheng. "A facile synthesis of pyrimidin-4-ones." Tetrahedron Letters 51, no. 3 (2010): 548–49. http://dx.doi.org/10.1016/j.tetlet.2009.11.096.

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2

Bayard, Ph, F. Sainte, R. Beaudegnies, and L. Ghosez. "A Diels-Alder route towards pyrimidin-4-ones." Tetrahedron Letters 29, no. 31 (1988): 3799–802. http://dx.doi.org/10.1016/s0040-4039(00)82118-8.

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3

Toplak, Renata, Jurij Svete, Simona Golič Grdadolnik, and Branko Stanovnik. "Methyl (Z)-2-[(Benzyloxycarbonyl)amino]-3-dimethyl- aminopropenoate in the Synthesis of Heterocyclic Systems. Synthesis of (Benzyloxycarbonyl)amino Substituted Fused Pyrimidinones." Collection of Czechoslovak Chemical Communications 64, no. 2 (1999): 177–89. http://dx.doi.org/10.1135/cccc19990177.

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Methyl (Z)-2-[(benzyloxycarbonyl)amino]-3-dimethylaminopropenoate (1) was used as a reagent for preparation of 3-[(benzyloxycarbonyl)amino] substituted 4H-pyrido[1,2-a]pyrimidin-4-ones 17-21, 4H-pyrimido[1,2-b]pyridazin-4-ones 22 and 23, 5H-[1,2,4]triazolo[2,3-a]- pyrimidin-5-one 24, 5H-thiazolo[3,2-a]pyrimidin-5-one 25, and 4H-pyrazino[1,2-a]pyrimidin-4-one 26. Removal of the benzyloxycarbonyl group by catalytical transfer hydrogenation with Pd/C in the presence of cyclohexene is selective to give 3-amino-4H-pyrido[1,2-a]- pyrimidin-4-ones 27-30 in 85-92% yields, or with hydrogen bromide in a

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4

EL-Mahdy, Ahmed F. M., Hassan A. H. El-Sherief, and Zainab A. Hozien. "Convenient One-Pot Four-Component Synthesis of 6,8-Disubstituted-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4(3H)-ones via a Triple Mannich Reaction." Australian Journal of Chemistry 72, no. 7 (2019): 542. http://dx.doi.org/10.1071/ch19088.

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An efficient and simple one-pot four-component protocol has been developed and performed for the synthesis of 6,8-disubstituted-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4(3H)-ones, involving a triple Mannich reaction of 6-amino-2-(ethylthio)pyrimidin-4(3H)-one, formaldehyde, primary amines, and alcohols. Secondary amines were also utilised instead of alcohols as Mannich nucleophiles, and a variety of functional groups and electronically varied reaction partners were tolerated. This one-pot reaction facilitated the generation of a library of pyrimido[4,5-d]pyrimidin-4(3H)-ones in very good to

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5

Donghi, Monica, Silvia Pesci, Vincenzo Summa, Uwe Koch, Stephane Spieser, and Cristina Gardelli. "Regioselective Synthesis of 7,8-Dihydropyrrolo[1,2-a]pyrimidin-4(6H)-ones and 7,8-Dihydropyrrolo[1,2-a]pyrimidin-2(6H)-ones." Synlett 2010, no. 02 (2009): 235–39. http://dx.doi.org/10.1055/s-0029-1218566.

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6

Hermecz, István, Annamária Molnár, Ferenc Faigl, Benjamin Podányi, Zoltán Finta, and László Balázs. "Synthesis of Halogenated 4H-Pyrido[1,2-a]pyrimidin-4-ones." HETEROCYCLES 78, no. 10 (2009): 2477. http://dx.doi.org/10.3987/com-09-11746.

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7

Horváth, Gábor, István Hermecz, Ágnes Horváth, et al. "Electronic structure of 4H-pyrido[1,2-a]pyrimidin-4-ones." Journal of Heterocyclic Chemistry 22, no. 2 (1985): 481–89. http://dx.doi.org/10.1002/jhet.5570220255.

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8

Dennin, F., D. Blondeau, and H. Sliwa. "Synthesis of derivatives of pyrazino[1,2-a]pyrimidin-4-ones." Journal of Heterocyclic Chemistry 27, no. 6 (1990): 1639–43. http://dx.doi.org/10.1002/jhet.5570270621.

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9

Donghi, Monica, Silvia Pesci, Vincenzo Summa, Uwe Koch, Stephane Spieser, and Cristina Gardelli. "ChemInform Abstract: Regioselective Synthesis of 7,8-Dihydropyrrolo[1,2-a]pyrimidin-4(6H)-ones and 7,8-Dihydropyrrolo[1,2-a]pyrimidin-2(6H)-ones." ChemInform 41, no. 21 (2010): no. http://dx.doi.org/10.1002/chin.201021162.

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10

DENNIN, F., D. BLONDEAU, and H. SLIWA. "ChemInform Abstract: Synthesis of 9-Hydroxypyrimido(1,6-a)pyrimidin-4-ones." ChemInform 22, no. 19 (2010): no. http://dx.doi.org/10.1002/chin.199119193.

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11

Mane, U. R., H. Li, J. Huang, et al. "Pyrido[1,2-a]pyrimidin-4-ones as antiplasmodial falcipain-2 inhibitors." Bioorganic & Medicinal Chemistry 20, no. 21 (2012): 6296–304. http://dx.doi.org/10.1016/j.bmc.2012.09.008.

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12

Nie, Li Fei, Guozheng Huang, Khurshed Bozorov, et al. "Diversity-oriented synthesis of amide derivatives of tricyclic thieno[2,3-d]pyrimidin-4(3H)-ones and evaluation of their influence on melanin synthesis in murine B16 cells." Heterocyclic Communications 24, no. 1 (2018): 43–50. http://dx.doi.org/10.1515/hc-2017-0256.

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Abstract A diversity-oriented synthesis of amide-containing thieno[2,3-d]pyrimidin-4(3H)-ones is reported. All compounds were tested for their influence on melanin synthesis in murine B16 cells. The azepine fragment in thieno[2,3-d]pyrimidin-4(3H)-one skeleton significantly increases the melanin content.

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13

Baudequin, Christine, Laurent Bischoff, Christophe Hoarau, et al. "Ortho-Directed Palladium-Catalyzed Direct C–H Functionalization of 3-Picolinyl- and 3-(2-Cyanoethyl)pyrimidin-4(3H)-ones with Aryl Halides." Synlett 31, no. 12 (2020): 1185–90. http://dx.doi.org/10.1055/s-0040-1707523.

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The ortho-directed palladium-catalyzed direct C–H arylation of 3-picolinylpyrimidin-4-one was achieved by using various aryl halides. The method was extended to C–H arylation of pyrimidin-4-ones containing a methoxy group and an aryl group at the C5 site. The 2-cyanoethyl substituent was also evaluated as an ortho-directing group. The method gives access to novel N-substituted 2-aryl or 2,5-diaryl pyrimidin-4-ones. A standard three-step deprotection sequence for the picolinyl group was also studied.

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14

Xie, Ying, Tengfei Chen, Shaomin Fu, Huanfeng Jiang, and Wei Zeng. "Pd-catalyzed carbonylative cycloamidation of ketoimines for the synthesis of pyrido[1,2-a]pyrimidin-4-ones." Chemical Communications 51, no. 45 (2015): 9377–80. http://dx.doi.org/10.1039/c5cc02631h.

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15

Adams, Nicholas D., Stanley J. Schmidt, Steven D. Knight, and Dashyant Dhanak. "A novel synthesis of substituted 4H-pyrazolo[3,4-d]pyrimidin-4-ones." Tetrahedron Letters 48, no. 23 (2007): 3983–86. http://dx.doi.org/10.1016/j.tetlet.2007.04.043.

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16

Harriman, Geraldine C. B., Shannon Chi, Min Zhang, Andrea Crowe, Robert A. Bennett, and Ian Parsons. "Synthesis of 4-trifluoromethylpyrido[1,2-a]pyrimidin-2-ones utilizing activated alkynoates." Tetrahedron Letters 44, no. 18 (2003): 3659–62. http://dx.doi.org/10.1016/s0040-4039(03)00700-7.

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17

DENNIN, F., D. BLONDEAU, and H. SLIWA. "ChemInform Abstract: Synthesis of Derivatives of Pyrazino(1,2-a)pyrimidin-4-ones." ChemInform 22, no. 11 (2010): no. http://dx.doi.org/10.1002/chin.199111219.

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18

Xie, Yangxi, and Jian Wang. "N-Heterocyclic carbene-catalyzed annulation of ynals with amidines: access to 1,2,6-trisubstituted pyrimidin-4-ones." Chemical Communications 54, no. 36 (2018): 4597–600. http://dx.doi.org/10.1039/c8cc02023j.

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19

Hermecz, István, and Ágnes Horváth. "A ring transformation of 6,7-dihydro-4H-pyrido[1,2-a]pyrimidin-4-ones." Tetrahedron 55, no. 33 (1999): 10221–30. http://dx.doi.org/10.1016/s0040-4020(99)00548-7.

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20

Dutta, B. C., K. K. Das, and B. N. Goswami. "Cycloaddition Reaction: Synthesis of 5-Substituted 1,3,4-Thiadiazolo[3,2-a]pyrimidin-6-one." Journal of Chemical Research 23, no. 1 (1999): 36–37. http://dx.doi.org/10.1177/174751989902300124.

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21

Ghosh, Prasanjit, Gautam Chhetri, and Sajal Das. "Metal free C-3 chalcogenation (sulfenylation and selenylation) of 4H-pyrido[1,2-a]pyrimidin-4-ones." RSC Advances 11, no. 17 (2021): 10258–63. http://dx.doi.org/10.1039/d1ra00834j.

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22

Lv, Junliang, Ying Liang, Peiling He, Zhihao Cai, Jianwen Liu, and Fengxi Huang. "Palladium-catalyzed direct alkenylation of 2-methyl-4H-pyrido[1,2-a]pyrimidin-4-ones using oxygen as the oxidant." RSC Advances 5, no. 46 (2015): 36171–74. http://dx.doi.org/10.1039/c5ra02932e.

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23

Singh, Kamaljit, and Kawaljit Singh. "An Efficacious Protocol for the Oxidation of 3,4-Dihydropyrimidin-2(1H)-ones using Pyridinium Chlorochromate as Catalyst." Australian Journal of Chemistry 61, no. 11 (2008): 910. http://dx.doi.org/10.1071/ch07432.

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4-Unsubstituted as well as 4,6-aryl/alkyl-3,4-dihydropyrimidin-2(1H)-ones were oxidized under neutral conditions using pyridinium chlorochromate to obtain the corresponding pyrimidin-2(1H)-ones in a synthetically useful manner.

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24

Shi, Pengfei, Song Li, Lu-Min Hu, Cong Wang, Teck-Peng Loh, and Xu-Hong Hu. "The ruthenium-catalyzed C–H functionalization of enamides with isocyanates: easy entry to pyrimidin-4-ones." Chemical Communications 55, no. 74 (2019): 11115–18. http://dx.doi.org/10.1039/c9cc03612a.

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25

Dauzonne, Daniel, and Anne Adam-Launay. "A convenient procedure for the preparation of 5,6-dihydro-6-nitro-5-phenylfuro[2,3-d]pyrimidin-4(3H)-ones and 5-phenylfuro[2,3-d]pyrimidin-4(3H)-ones." Tetrahedron 48, no. 15 (1992): 3069–80. http://dx.doi.org/10.1016/s0040-4020(01)92249-5.

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26

Zhang, Xiaohong, Qiulian Lin, and Ping Zhong. "A Facile One-pot Synthesis of 1-Arylpyrazolo[3,4-d]Pyrimidin- 4-ones." Molecules 15, no. 5 (2010): 3079–86. http://dx.doi.org/10.3390/molecules15053079.

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27

Kirsch, Gilbert, and Ismail Abdillahi. "Synthesis of a Novel Series of Thieno[3,2-d]pyrimidin-4-(3H)-ones." Synthesis 2010, no. 09 (2010): 1428–30. http://dx.doi.org/10.1055/s-0029-1218697.

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28

Bernhardt, Paul V., and Curt Wentrup. "Structures of 4-Iminopyrido[1,2-a]pyrimidines, Pyrido[1,2-a]pyrimidin-4-ones, Pyridopyrimidinium Olates, and Thiazolo[3,2-a]pyrimidine Analogues." Australian Journal of Chemistry 65, no. 4 (2012): 371. http://dx.doi.org/10.1071/ch12040.

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The Structure-Correlation Principle of Bürgi and Dunitz is invoked in an analysis of the structures of 2-chloro-8-methyl-4-(2-(4-picolinyl)imino-4H-pyrido[1,2-a]pyrimidine 8, 7-chloro-5-(2-thiazolyl)imino-5H-thiazolo[3,2-a]pyrimidine 9, 2-methylamino-4H-pyrido[1,2-a]pyrimidin-4-one 10, 7-methylthio-5H-thiazolo[3,2-a]pyrimidin-5-one 11, 2,3-dihydro-7-methylthio-5H-thiazolo[3,2-a]pyrimidin-5-one 12, and 1-methyl-2-[(o-tert-butylphenyl)imino]-1,2-dihydropyrido[1,2-a]pyrimidin-1-ium-4-olate 13, which have been determined by X-ray crystallography. The most notable structural peculiarities are the l

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29

Wang, Shaohua, Wenjie Liu, Zhihao Cai, Ziying Li, Jianwen Liu, and Anda Wang. "Iodine-Catalyzed Regioselective Sulfenylation of 4H-Pyrido[1,2-a]pyrimidin-4-ones with Sulfonyl Hydrazides." Synlett 29, no. 01 (2017): 116–20. http://dx.doi.org/10.1055/s-0036-1588549.

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A simple and efficient method for direct sulfenylation of 4H-pyrido[1,2-a]pyrimidin-4-ones with sulfonyl hydrazides has been developed. The transformation is catalyzed by iodine under metal-free conditions with high regioselectivity and good functional-group tolerance.

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30

Rečnik, Simon, Anton Meden, Branko Stanovnik, and Jurij Svete. "Ring Contractions of 3-Azido-4H-quinolizin-4-ones and 3-Azido-4H-azino[1,2 - x]pyrimidin-4-ones: a Novel Approach to 3-Aminoindolizines and their Aza Analogues." Australian Journal of Chemistry 61, no. 2 (2008): 107. http://dx.doi.org/10.1071/ch07318.

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Thermal transformations of 3-azido-4H-quinolizin-4-ones 4a,b and 3-azido-4H-azino[1,2–x]pyrimidin-4-ones 4c,d, available from the corresponding heteroarylamines 2a–d, were studied. The reaction products were mostly dependent on the solvent. Thus, heating of 3-azido-1-cyano-4H-quinolizin-4-one (4a) in toluene afforded 2-(pyridin-2-yl)fumaronitrile 5a, whereas 3-amino-1-cyano-4H-quinolizin-4-one (8) was obtained on treatment of 4a in a mixture of toluene and trifluoroacetic anhydride. However, heating of 4a in acetic anhydride and in acetic acid resulted in a ring contraction to produce 3-(diace

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31

Tkachuk, V. M., V. A. Sukach, K. V. Kovalchuk, M. V. Vovk, and V. G. Nenajdenko. "Development of an efficient route to CF3-substituted pyrrolopyrimidines through understanding the competition between Michael and aza-Henry reactions." Organic & Biomolecular Chemistry 13, no. 5 (2015): 1420–28. http://dx.doi.org/10.1039/c4ob02233e.

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32

Mohan, Chander, Vipan Kumar, and Mohinder P. Mahajan. "A facile synthesis and thio-Claisen rearrangement of 3-aryl-2-phenyl-5-prop-2-ynylsulfanyl-3H-pyrimidin-4-ones: regioselective transformation to thieno[3,2-d]pyrimidin-4-ones." Tetrahedron Letters 45, no. 31 (2004): 6075–77. http://dx.doi.org/10.1016/j.tetlet.2004.05.121.

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33

Kobayashi, Kazuhiro, Toshihide Komatsu, Yuki Yokoi, and Hisatoshi Konishi. "ChemInform Abstract: A Convenient Synthesis of 1,3-Disubstituted 4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-ones and 4-Thioxo-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-ones." ChemInform 42, no. 46 (2011): no. http://dx.doi.org/10.1002/chin.201146165.

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34

Wippich, Petra, Michael Gütschow, and Siegfried Leistner. "Regioselective Preparation of 1-(Bromomethyl)-5H-thiazolo[3,2-a]quinazolin-5-ones and Analogous 5H-Thieno[3,2-e]thiazolo[3,2-a]pyrimidin-5-ones from Fused 2-(Alkenylthio)pyrimidin-4-ones." Synthesis 2000, no. 05 (2000): 714–20. http://dx.doi.org/10.1055/s-2000-6390.

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35

Yan, Jinlong, Xinliang Fu, and Wei Li. "Synthesis of Spiro Thiazolo[3,2-a]Pyrimidine-Tetrahydrothiophenes via Sulfa-Michael/Aldol Cascade Reactions." Journal of Chemical Research 41, no. 12 (2017): 722–24. http://dx.doi.org/10.3184/174751917x15125690124282.

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The sulfa-Michael/aldol cascade reaction of 2-arylmethylidene-6,7-dihydro-2 H-thiazolo[3,2- a]pyrimidin-3(5 H)-ones and 1,4-dithiane-2,5-diol afforded novel 2′-aryl-4′-hydroxy-4′,5′,6,7-tetrahydro-2′ H-spiro[thiazolo[3,2- a]pyrimidine-2,3′-thiophen]-3(5 H)-ones in good yields. The structures of all products were characterised thoroughly by NMR, IR, HRMS, together with X-ray crystallographic analysis.

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36

Puttaraju, Kallimeledoddi B., Kalegowda Shivashankar, Chandra, et al. "Microwave assisted synthesis of dihydrobenzo[4,5]imidazo[1,2-a]pyrimidin-4-ones; synthesis, in vitro antimicrobial and anticancer activities of novel coumarin substituted dihydrobenzo[4,5]imidazo[1,2-a]pyrimidin-4-ones." European Journal of Medicinal Chemistry 69 (November 2013): 316–22. http://dx.doi.org/10.1016/j.ejmech.2013.07.015.

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37

Zhang, Jinqi, Xu Meng, Chaoying Yu, Gexin Chen, and Peiqing Zhao. "Heterogeneous Cu/OMS-2 as an efficient catalyst for the synthesis of tetrasubstituted 1,4-enediones and 4H-pyrido[1,2-a]-pyrimidin-4-ones." RSC Advances 5, no. 106 (2015): 87221–27. http://dx.doi.org/10.1039/c5ra17351e.

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Copper supported on OMS-2: a heterogeneous catalyst Cu/OMS-2 was prepared for the synthesis of tetrasubstituted 1,4-enediones and 4H-pyrido[1,2-a]-pyrimidin-4-ones under the same conditions with air as the oxidant.

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38

Wang, Hong-Mei, Tian-Shuai Wang, Sheng-Jie He, Zong-Yun Chen, and Yang-Gen Hu. "An efficient synthesis of 3-alkyl-2-diversity-substituted benzofuro[3,2-d]pyrimidin-4(3H)-one derivatives." Journal of Chemical Research 43, no. 5-6 (2019): 201–4. http://dx.doi.org/10.1177/1747519819858734.

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Benzofuro[3,2- d]pyrimidine derivatives are prepared using aza-Wittig reactions of iminophosphoranes with n-butyl isocyanate at 40–50 °C to give carbodiimide intermediates, which are reacted with nitrogen-oxygen-containing nucleophiles to give 3-alkyl-2-amino (aryloxy/alkoxy)-benzofuro[3,2- d]pyrimidin-4(3 H)-ones in satisfactory yields in the presence of a catalytic amount of sodium ethoxide or K2CO3. The iminophosphorane also reacts directly with excess carbon disulfide, followed by n-propylamine; further reaction with alkyl halides or halogenated aliphatic esters in the presence of anhydrou

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39

Zanatta, Nilo, Leonardo Fantinel, Rogério Lourega, Helio Bonacorso, and Marcos Martins. "A Convenient Synthesis of 5- and 6-Substituted 2-Phenyl-3H-pyrimidin-4-ones." Synthesis 2008, no. 3 (2008): 358–62. http://dx.doi.org/10.1055/s-2008-1032032.

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40

Güllü, Mustafa, Ali Dinçsönmez, and Öznur Özyavaş. "Facile Synthesis of Novel Pyrimido[1,2-a]pyrimidin-4-ones from Highly Reactive Malonates." European Journal of Organic Chemistry 2010, no. 11 (2010): 2113–20. http://dx.doi.org/10.1002/ejoc.200901419.

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41

Vovk, Mykhaylo V., Andrij V. Bol’but, Viktor I. Dorokhov, and Volodymyr V. Pyrozhenko. "A NEW SYNTHETIC ACCESS TO 2-TRIHALOGENOMETHYL- 3,4-DIHYDROFURO[2,3-d]- PYRIMIDIN-4-ONES." Synthetic Communications 32, no. 24 (2002): 3749–53. http://dx.doi.org/10.1081/scc-120015392.

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42

Baradarani, Mehdi M., Adrian Clark, and Rolf H. Prager. "The Chemistry of 5-Oxodihydroisoxazoles. XXI Amidines and Pyrimidin-4-ones from the Reaction of Isoxazol-5(2H)-ones with Amines." Australian Journal of Chemistry 51, no. 6 (1998): 491. http://dx.doi.org/10.1071/c97199.

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While isoxazol-5(2H)-ones substituted with heterocycles at C2 but unsubstituted at C3 react with amines to give either amidines or malonamides, their reaction at low temperatures with lithium dialkylamides is a preparatively useful procedure for obtaining the amidines in most cases. Longer reaction times may lead to formation of pyrimidin-4-ones when ester groups are present at C4 of the isoxazolone.

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43

Wippich, Petra, Michael Guetschow, and Siegfried Leistner. "ChemInform Abstract: Regioselective Preparation of 1-(Bromomethyl)-5H-thiazolo[3,2-a]quinazolin-5-ones and Analogous 5H-Thieno[3,2-e]thiazolo[3,2-a]pyrimidin-5-ones from Fused 2-(Alkenylthio)pyrimidin-4-ones." ChemInform 31, no. 34 (2010): no. http://dx.doi.org/10.1002/chin.200034147.

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44

Hafez, Hend N., Abdel-Rhman B. A. El-Gazzar, and Magdi E. A. Zaki. "Simple approach to thieno[3,2-d]pyrimidines as new scaffolds of antimicrobial activities." Acta Pharmaceutica 66, no. 3 (2016): 331–51. http://dx.doi.org/10.1515/acph-2016-0029.

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Abstract 6ʹ-(4-Chlorophenyl)-spiro[cyclohexane-1,2ʹ-thieno[3,2-d][1,3] oxazin]-4ʹ(1ʹH)-one (1) was synthesized and used as a starting material for the synthesis of a novel series of spiro compounds having biologically active sulfonamide 2a-e and 3ʹ-(4-acetylphenyl)-6ʹ- (4-chlorophenyl)-1ʹH-spiro[cyclohexane-1,2ʹ-thieno[3,2-d] pyrimidine-4ʹ(3ʹH)-one (3). Compound 2a was used as a key intermediate for the synthesis of sulfonyl carbothioamide derivatives 4a-c. Also, compound 3 was used as an intermediate for the synthesis of 3ʹH-spiro[cyclohexane-1,2ʹ-thieno[3,2-d]pyrimidin]-3ʹ-yl] phenyl}-2-imin

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45

Puttaraju, Kallimeledoddi B., Kalegowda Shivashankar, Chandra Chandra, et al. "ChemInform Abstract: Microwave Assisted Synthesis of Dihydrobenzo[4,5]imidazo[1,2-a]pyrimidin-4-ones; Synthesis, in vitro Antimicrobial and Anticancer Activities of Novel Coumarin Substituted Dihydrobenzo[4,5]imidazo[1,2-a]pyrimidin-4-ones." ChemInform 45, no. 15 (2014): no. http://dx.doi.org/10.1002/chin.201415186.

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46

Farat, O. K., E. V. Zaliznaya, S. A. Varenichenko, and V. I. Markov. "Rearrangement of substituted pyrimidin-4-ones under the Vilsmeier-Haack reaction." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 1 (January 2021): 101–9. http://dx.doi.org/10.32434/0321-4095-2021-134-1-101-109.

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Abstract:

The article describes the result of our study on rearrangements of four heterocyclic systems with variation of oxygen and nitrogen atoms, in particular, the results of formylation of 2,2-disubstituted hydroquinazolones under the conditions of the Vilsmeier-Haack reaction. A new rearrangement of spiro derivatives of quinazolin-4(3H)-ones was discovered under the action of a formylating reagent with the formation of predicted 1-cyclohex(pent)-1-en-1-ylchinazolin-4-(1H)-ones. The absence of this rearrangement for 2,2-dimethyl-2,3-dihydroquinazolin-4(1H)-one is explained. 6',7',7'-Trimethyl-1',5',

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DAUZONNE, D., and A. ADAM-LAUNAY. "ChemInform Abstract: A Convenient Procedure for the Preparation of 5,6-Dihydro-6-nitro-5- phenylfuro(2,3-d)pyrimidin-4(3H)-ones (III) and 5-Phenylfuro(2,3-d) pyrimidin-4(3H)-ones (IV)." ChemInform 23, no. 33 (2010): no. http://dx.doi.org/10.1002/chin.199233201.

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J. Peat, Andrew, Paul L. Feldman, Dulce Garrido, Yu C. Guo, and Donald L. Hertzog. "A Novel One-Pot Synthesis of N-Substituted Thieno[3,2-d]pyrimidin-4(3H)-ones." HETEROCYCLES 70, no. 1 (2006): 587. http://dx.doi.org/10.3987/com-06-s(w)31.

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Boyd, Helen F., Sean T. Flynn, Deirdre M. B. Hickey, et al. "2-(Alkylthio)pyrimidin-4-ones as novel, reversible inhibitors of lipoprotein-associated phospholipase A 2." Bioorganic & Medicinal Chemistry Letters 10, no. 4 (2000): 395–98. http://dx.doi.org/10.1016/s0960-894x(00)00002-0.

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Riva, Renata, Luca Banfi, Andrea Basso, and Paola Zito. "A new diversity oriented and metal-free approach to highly functionalized 3H-pyrimidin-4-ones." Organic & Biomolecular Chemistry 9, no. 7 (2011): 2107. http://dx.doi.org/10.1039/c0ob00978d.

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