Synthesis of 5,6-dihydrothieno(and furo)pyrimidines bearing an active methine group at the 4-position
作者:Hiroshi Maruoka、Kenji Yamagata、Motoyoshi Yamazaki
DOI:10.1002/jhet.5570380140
日期:2001.1
tin(IV) chloride and triethylamine provided the corresponding ethyl 2-(5,6-dihydro-2-phenylthieno(and furo)[2,3-d]pyrimidin-4-yl)-3-oxobutanoates (2a-c and 9a-c). Similarly, compounds 1a-c and 4a-c reacted with dialkyl malonates to give the corresponding dialkyl(5,6-dihydro-2-phenylthieno(and furo)[2,3-d]pyrimidin-4-yl)propanedioates (5a-c, 6a-c, 10a-c and 11a-c).
在氯化锡(IV)和三乙胺存在下,2-苯甲酰胺基-4,5-二氢-3-噻吩(和-3-呋喃)腈(1a-c和4a-c)与乙酰乙酸乙酯的反应提供了相应的2-(5,6-二氢-2-苯基噻吩并(和呋喃)[2,3 - d ]嘧啶-4-基)-3-氧代丁酸乙酯(2a-c和9a-c)。类似地,化合物1a-c和4a-c与丙二酸二烷基酯反应生成相应的二烷基(5,6-二氢-2-苯基噻吩并(呋喃)[2,3 - d ]嘧啶-4-基)丙二酸酯(5a- c,6a-c,10a-c和11a-c)。