Synthesis of Chrysogine, a Metabolite of Penicillium chrysogenum and some related 2-substituted 4-(3H)-Quinazolinones
作者:Jan Bergman、Anna Brynolf
DOI:10.1016/s0040-4020(01)86694-1
日期:1990.1
Syntheses of both enantiomers of chrysogine, 2-(α-hydroxyethyl)-4(3H)-quinazolinone, 1 from 2-ammobenzamide are reported. Thus reaction of 2-aminobenzamide and optically active α-acetoxypropionyl chloride gave 9, which upon saponification and cyclization induced by aqueous sodium carbonate at room temperature gave chrysogine. The enantiomeric purity of 1 was determined by NMR. Inversion of (-)-(S)-1
据报道,由2-氨苯甲酰胺合成了金葡胺的两种对映体2-(α-羟乙基)-4(3H)-喹唑啉酮1。因此,2-氨基苯甲酰胺与旋光性α-乙酰氧基丙酰氯的反应得到9,其在室温下由碳酸钠水溶液诱导的皂化和环化后得到金柳胺。通过NMR确定1的对映体纯度。使用Mitsunobo反应将(-)-(S)-1转化,得到(+)-(R)-1。的还原2 -乙酰基-4(3H)-qumazolinone 2与面包酵母,得到的S-对映体1。可以扩展使用的环化方法,并且还报道了许多2-(α-羟基)烷基-4-(3H)-喹唑啉酮。