Studies towards C-3 functionalization of β-lactams using substituted allylsilanes
作者:RENU THAPAR、RESHMA、S S BARI
DOI:10.1007/s12039-016-1161-6
日期:2016.11
An effective and stereoselective synthesis of 3-(1′-methyl/phenylallyl)-3-phenylthio-β-lactams (3/4) using substituted allylsilane and Lewis acid is described. The reaction leads to the formation of a mixture of C-3 substituted allyl β-Lactams. However, these compounds on desulphurisation using tri-n-butyltinhydride and Raney Ni provide two separable diastereomers of the reduced product. In the presence
的3-有效和立体选择性合成(1 ' -甲基/苯基烯丙基)-3-苯硫基-β内酰胺(3/4使用取代的烯丙基硅烷和路易斯酸)进行说明。该反应导致形成C-3取代的烯丙基β-内酰胺的混合物。然而,这些使用三正丁基氢化锡和阮内镍脱硫的化合物提供了还原产物的两种可分离的非对映异构体。 在TiCl 4的存在下,诸如巴豆基硅烷和肉桂基硅烷之类的硅烷有效地添加在反式-3-氯-3-苯硫基-β-内酰胺的C-3位置。