Chlorotrimethylsilane Activation of Acylcyanamides for the Synthesis of Mono-<i>N</i>-acylguanidines
作者:Ryan E. Looper、Travis J. Haussener、James B. C. Mack
DOI:10.1021/jo201264j
日期:2011.8.19
monoprotected guanidines is presented. Treatment of an acylcyanamide with chlorotrimethylsilane generates a reactive N-silylcarbodiimide capable of guanylating a variety of amines. Typically the reaction is complete in 15 min for primary and secondary aliphatic amines at rt. Hindered amines and anilines are also competent nucleophiles but require extended reaction times.
提出了一种简单有效的单锅法合成单保护胍。用三甲基氯硅烷处理酰基氰胺会生成反应性N-甲硅烷基碳二亚胺,能够使多种胺类鸟苷酸化。通常,脂肪族伯胺和仲胺的反应在室温下在 15 分钟内完成。受阻胺和苯胺也是有能力的亲核试剂,但需要延长反应时间。