Electrophilic Amination of Amino Acids with N-Boc-oxaziridines: Efficient Preparation of N-Orthogonally Diprotected Hydrazino Acids and Piperazic Acid Derivatives
作者:Jean-Christophe Hannachi、Joëlle Vidal、Jean-Christophe Mulatier、André Collet
DOI:10.1021/jo035700b
日期:2004.4.1
preparation of enantiopure Nα,Nβ-orthogonally diprotected α-hydrazino acids 1 is developed on a multigram scale. The key reaction is the efficient electrophilic amination of N-benzyl amino acids 6 with N-Boc-oxaziridine 7 and accommodates various functional groups encountered in side chains of amino acids. The cyclic 2,3,4,5-tetrahydro-3-pyridazine carboxylic acid (piperazic acid) derivatives 2 and 3 or
对映体纯n的一般两步制备α,N β -orthogonally双保护的α-肼基酸1是在多克规模开发的。关键反应是将N-苄基氨基酸6与N -Boc-恶唑烷7进行有效的亲电胺化反应,并容纳氨基酸侧链中遇到的各种官能团。环状2,3,4,5-四氢-3-哒嗪羧酸(哌嗪酸)衍生物2和3或环状3,4-二氢-3-吡唑羧酸酯4方便地由谷氨酸或天冬氨酸经正交双保护制备。 α-肼基酸1m和1n。