A New Approach to Pyrazino[2,1-<i>b</i>]quinazolines and Pyrazino[1,2-<i>a</i>]thieno[3,2-<i>d</i>]pyrimidines
作者:Anton Tverdokhlebov、Svetlana Kulik、Alexander Kobko、Andrey Tolmachev、Oleg Shishkin、Alexander Chernega
DOI:10.1055/s-2007-966025
日期:——
The reaction of [2-(chloromethyl)-4-oxo-3,4-dihydroquinazolin-3-yl]acetonitrile and 2-(chloromethyl)-3-(2-oxopropyl)quinazolin-4(3H)-one with aliphatic primary amines was shown to yield 2-alkyl-3-(alkylimino)-1,2,3,4-tetrahydro-6H-pyrazino[2,1-b]quinazolin-6-ones and 2-alkyl-3-methyl-1,2-dihydro-6H-pyrazino[2,1-b]quinazolin-6-ones, respectively. The starting materials were prepared by alkylation of 2-(chloromethyl)quinazolin-4(3H)-one with chloroacetonitrile or chloroacetone. Furthermore 2-alkyl-3-(alkylimino)-1,2,3,4,7,8,9,10-octahydro-6H-[1]benzothieno[2,3-d]pyrazino[1,2-a]pyrimidin-6-ones and 8-alkyl-2,3,7-trimethyl-8,9-dihydro-4H-pyrazino[1,2-a]thieno[2,3-d]pyrimidin-4-ones were obtained through the same sequence starting from the appropriate 2-(chloromethyl)thieno[2,3-d]pyrimidin-4(3H)-ones.
研究表明,[2-(氯甲基)-4-氧代-3,4-二氢喹唑啉-3-基]乙腈和 2-(氯甲基)-3-(2-氧代丙基)喹唑啉-4(3H)-酮与脂肪族伯胺反应生成 2-烷基-3-(烷基亚氨基)-1、2,3,4-四氢-6H-吡嗪并[2,1-b]喹唑啉-6-酮和 2-烷基-3-甲基-1,2-二氢-6H-吡嗪并[2,1-b]喹唑啉-6-酮。这些起始材料是由 2-(氯甲基)喹唑啉-4(3H)-酮与氯乙腈或氯丙酮发生烷基化反应而制备的。Furthermore 2-alkyl-3-(alkylimino)-1,2,3,4,7,8,9,10-octahydro-6H-[1]benzothieno[2,3-d]pyrazino[1,2-a]pyrimidin-6-ones and 8-alkyl-2,3,7-trimethyl-8,9-dihydro-4H-pyrazino[1,2,3-d]嘧啶-4-酮和 8-烷基-2,3,7-三甲基-8,9-二氢-4H-吡嗪并[1, 2-a]噻吩并[2,3-d]嘧啶-4-酮。