Asymmetric Allylboration of α,β-Enals as a Surrogate for the Enantioselective Synthesis of Allylic Amines and α-Amino Acids
作者:P. Veeraraghavan Ramachandran、Thomas E. Burghardt、M. Venkat Ram Reddy
DOI:10.1021/jo048144+
日期:2005.3.1
Optically pure allylic amines have been synthesized from α,β-unsaturated aldehydes via allylboration with (−)-B-allyldiisopinocampheylborane, followed by Overman rearrangement. By incorporating crotyl and alkoxyallylboration, functionalization at δ-position was readily accomplished. By applying this methodology, the synthesis of several chiral α-amino acids has been achieved.
光学纯的烯丙基胺是由α,β-不饱和醛通过与(-)- B-烯丙基异opinocampheylborane的烯丙基硼化,然后进行超载重排而合成的。通过结合巴豆基和烷氧基烯丙基化,很容易实现δ位的官能化。通过应用该方法,已经实现了几种手性α-氨基酸的合成。