Efficient methods for the synthesis of pyrido[2,3-d]pyrimidin-5-ones from 4-amino-5-acetylpyrimidines
摘要:
New methods for annelation of a pyridine ring to a pyrimidine ring were suggested. Substituted 8H-pyrido[2,3-d]pyrimidin-5-ones (8a-f) were synthesized by the interaction of 2,6-disubstituted 4-amino-5-acetylpyrimidines (1-4) with formamide or acetamide acetals followed by cyclization under the action of sodium methoxide in methanol. 2,4-Disubstituted 7-phenyl-8H-pyrido[2,3-d]pyrimidin-5-ones (11a-c) were prepared by the reaction of 2,6-disubstituted 5-acetyl-4-benzoylaminopyrimidines (10a-c) with MeONa in boiling BuOH.
Efficient methods for the synthesis of pyrido[2,3-d]pyrimidin-5-ones from 4-amino-5-acetylpyrimidines
摘要:
New methods for annelation of a pyridine ring to a pyrimidine ring were suggested. Substituted 8H-pyrido[2,3-d]pyrimidin-5-ones (8a-f) were synthesized by the interaction of 2,6-disubstituted 4-amino-5-acetylpyrimidines (1-4) with formamide or acetamide acetals followed by cyclization under the action of sodium methoxide in methanol. 2,4-Disubstituted 7-phenyl-8H-pyrido[2,3-d]pyrimidin-5-ones (11a-c) were prepared by the reaction of 2,6-disubstituted 5-acetyl-4-benzoylaminopyrimidines (10a-c) with MeONa in boiling BuOH.
Synthesis of new 5-hydroxyquinazoline derivatives from functionalized 5-acetyl-6-methylpyrimidines
作者:Alexander V. Komkov、Mikhail A. Kozlov、Yurii A. Linitskii、Leonid S. Vasil’ev、Andrey S. Dmitrenok、Igor V. Zavarzin
DOI:10.1007/s10593-021-02981-9
日期:2021.8
A new method for the synthesis of quinazolines based on the annulation of the benzene ring to 5-acetyl-6 methylpyrimidin-2-one(thione) derivatives has been proposed. Condensation of the latter at the methyl group with dimethylformamide dimethyl acetal in boiling PhH leads to the formation of 5-acetyl-6-[2-(dimethylamino)vinyl]pyrimidin-2-ones(thiones), which, when boiled with MeONa in MeOH, cyclize
Synthesis of novel pyrimido[4,5-d]pyrimidine derivatives from 5-acetyl-4-aminopyrimidines
作者:Alexander V. Komkov、Mikhail А. Kozlov、Mikhail А. Prezent、Andrey S. Dmitrenok、Natalya G. Kolotyrkina、Mikhail E. Minyaev、Igor V. Zavarzin
DOI:10.1007/s10593-022-03078-7
日期:2022.5
Two routes were proposed for the synthesis of pyrimido[4,5-d]pyrimidinederivatives from 5-acetyl-4-aminopyrimidines. Acylation of 5-acetyl-4-aminopyrimidines followed by cyclization by the action of NH4OAc made it possible to access pyrimido[4,5-d]pyrimidines with alkyl, aryl, and hetaryl substituents in positions 2 and 7. Reductive amination of the acetyl group in 5-acetyl-4-aminopyrimidines and
提出了两种从 5-乙酰基-4-氨基嘧啶合成嘧啶并[4,5- d ]嘧啶衍生物的路线。5-乙酰基-4-氨基嘧啶的酰化,然后通过 NH4OAc 的作用进行环化,使得在 2 位和 7 位上具有烷基、芳基和杂芳基取代基的嘧啶并[4,5- d ] 嘧啶成为可能。乙酰基的还原胺化在 5-乙酰基-4-氨基嘧啶中的基团和随后与 DMF-DMA 或 HC(OEt) 3的环化导致形成 6-烷基-3,4-二氢嘧啶并[4,5- d ]嘧啶。
Komkow A. W., Ugrak B. I., Bogdanow W. S., Dorokhow W A., Isw. AN. Ser. khim, (1994) N 8, S 1469-1474
作者:Komkow A. W., Ugrak B. I., Bogdanow W. S., Dorokhow W A.