作者:John A Josey、Catherine A Tarlton、Courtney E Payne
DOI:10.1016/s0040-4039(98)01242-8
日期:1998.8
A novel linker for the generation of alkyl-, acyl- and arylguanidines as an attachment point in solid phase synthesis has been developed. Introduction of a suitably functionalized thiourea to Wang resin via a carbamate linkage, followed by displacement of sulfur with a 1° or 2° amine affords resin bound guanidines suitably protected for further manipulation. Activation of the thiourea with Mukaiyama's
已经开发了用于生成烷基,酰基和芳基胍作为固相合成中的连接点的新型连接子。通过氨基甲酸酯键将适当官能化的硫脲引入到Wang树脂中,然后用1°或2°胺置换硫,从而得到树脂结合的胍,该胍被适当保护以用于进一步操作。用Mukaiyama试剂活化硫脲可生成芳基胍。温和的酸处理可使其脱保护并从树脂中释放出来,从而以高收率和高纯度提供胍。