开发了合成新的吡啶并[2,3- d ]嘧啶和嘧啶并[4,5- d ][1,3]恶嗪衍生物的方法。当与 MeONa 在 BuOH 中回流加热时,用羧酸酐或酰氯酰化的 5-乙酰基-4-氨基嘧啶转化为吡啶并[2,3 - d ]嘧啶-5-酮衍生物,即乙酰甲基和酰胺羰基部分参与环化。在活化的CH的存在2基团(例如。,物理信道2)在酰胺部分中,环化包括该组和乙酰羰基引起吡啶并[2,3- d]嘧啶-7-one衍生物。5-乙酰基-4-氨基嘧啶与羧酸氯化物在二甲苯中回流反应,然后加入碱,得到嘧啶并[4,5- d ][1,3]恶嗪。
A method for the synthesis of methyl and ethyl 2-R-1-4-R-2-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-7-carboxylates was proposed. The method is based on condensation of 2-R-1-6-R-2-5-acetyl-4-aminopyrimidines with ethyl oxalate in the presence of MeONa or EtONa. Products of the Friedlander self-condensation of the starting pyrimidines were also obtained.
Synthesis of new pyrido[2,3-d]pyrimidine derivatives by three-component condensation of 5-acetyl-4-aminopyrimidines, cyclohexane-1,3-diones, and orthocarboxylic acid esters
作者:A. V. Komkov、M. A. Prezent、A. V. Ignatenko、I. P. Yakovlev、V. A. Dorokhov
DOI:10.1007/s11172-006-0552-0
日期:2006.11
derivatives with dimedone (or cyclohexane-1,3-dione) and triethyl orthoacetate (or triethyl orthopropionate) gave derivatives of 7-(1,3-dioxocyclohex-2-ylidene)-7,8-dihydropyrido[2,3-d]pyrimidine. These heterocyclic compounds containing the enamino ketone fragment can form boron chelates under the action of butoxy(diphenyl)borane.
Synthesis of pyrido[2,3-d]pyrimidin-7(8H)-one derivatives from 5-acetyl-4-aminopyrimidines and β-dicarbonyl compounds
作者:A. V. Komkov、I. P. Yakovlev、V. A. Dorokhov
DOI:10.1007/s11172-005-0320-6
日期:2005.3
Heating of 5-acetyl-4-aminopyrimidine derivatives with ethyl acetoacetate, ethyl benzoylacetate, and diethyl acetone-1, 3-dicarboxylate in the absence of a base gave the corresponding 6-acylpyrido[2, 3-d]pyrimidin-7(8H)-ones. Under analogous conditions, the reaction with ethyl malonate afforded ethyl 7-oxo-7, 8-dihydropyrido[2, 3-d]pyrimidine-6-carboxylates. The pyridone (rather than hydroxypyridine)
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。