Ramachandran P Veeraraghavan, Burghardt Thomas E, Reddy M Venkat Ram
Herbert C. Brown Center for Borane Research, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, USA
J Org Chem. 2005 Mar 18;70(6):2329-31. doi: 10.1021/jo048144+.
[reaction: see text] Optically pure allylic amines have been synthesized from alpha,beta-unsaturated aldehydes via allylboration with (-)-B-allyldiisopinocampheylborane, followed by Overman rearrangement. By incorporating crotyl and alkoxyallylboration, functionalization at delta-position was readily accomplished. By applying this methodology, the synthesis of several chiral alpha-amino acids has been achieved.
[反应:见正文] 通过用(-)-B-烯丙基二异松莰基硼烷进行烯丙基硼化反应,接着进行奥弗曼重排反应,从α,β-不饱和醛合成了光学纯的烯丙基胺。通过引入巴豆基和烷氧基烯丙基硼化反应,在δ位的官能团化很容易实现。通过应用这种方法,已经实现了几种手性α-氨基酸的合成。