A synthesis of 6-functionalized 7-unsubstituted- and 7-methyl[1,2,4]azolo[1,5-<i>a</i>]pyrimidine derivatives
作者:Maksim A. Kolosov、Elena H. Shvets、Dmitriy A. Manuenkov、Olesia G. Kulyk、Alexander V. Mazepa、Valeriy D. Orlov
DOI:10.1080/00397911.2019.1566476
日期:2019.2.16
2,4]azolo[1,5-a]pyrimidines (R = H or Me) were synthesized by Biginelli-like reaction of formaldehyde or acetaldehyde, aminoazoles, and corresponding β-dicarbonyl precursor. Alkylation of the obtained compounds proceeds smoothly at position 4, while oxidation leads to 7-R-[1,2,4]azolo[1,5-a]pyrimidines formation. 6-Ethoxycarbonyl derivatives could be reduced to the corresponding alcohols by LiAlH4 and
摘要 6-功能化的 7-R-4,7-二氢[1,2,4]唑并[1,5-a]嘧啶(R = H 或 Me)是通过甲醛或乙醛、氨基唑、和相应的β-二羰基前体。所得化合物的烷基化在 4 位顺利进行,而氧化导致 7-R-[1,2,4] 唑并 [1,5-a] 嘧啶的形成。6-乙氧基羰基衍生物可以被LiAlH4还原成相应的醇并水解成酸。图形概要