Palladium-catalyzed reaction of allyl carbamates; allylation of carbonucleophiles, and protection-deprotection of amines
作者:Ichiro Minami、Yukihiro Ohashi、Isao Shimizu、Jiro Tsuji
DOI:10.1016/s0040-4039(00)94850-0
日期:——
Allylation of carbonucleophiles with allylic carbamates under neutral conditions has been studied. The C-allylation of carbonucleophile is competitive with the N-allylation of amines, and the structure of amines is crucial for the selectivity. Bulky secondary amines gave the best results. Also a new method of protection-deprotection of amines as carbamates has been developed. Smooth deprotection is
已经研究了在中性条件下碳烯亲油与烯丙基氨基甲酸酯的烯丙基化。亲碳亲核体的C-烯丙基化与胺的N-烯丙基化竞争,并且胺的结构对于选择性至关重要。大体积的仲胺效果最好。还开发了一种胺作为氨基甲酸酯的保护-脱保护的新方法。通过氨基甲酸烯丙酯与甲酸的钯催化反应,可以实现平滑的脱保护。该方法特别适用于伯胺,包括旋光氨基酸。