N-Aminodipeptide derivatives can be easily prepared with highopticalpurity on solid phase via a Mitsunobu protocol between a solid supported α-hydroxyacid and a free phthaloylated α-Z-N-aminohydrazide.
通过固载的α-羟基酸和游离的邻苯二甲酰化的α- Z - N-氨基酰肼之间的Mitsunobu方案,可以容易地在固相上以高光学纯度制备N-氨基二肽衍生物。
Original and efficient method for the preparation of N-aminoamide pseudodipeptides in high optical purity
N-Aminoamide pseudodipeptides ZAAΨ[CO-N(NPht)]-AAOR can be easily obtained via the Mitsunobu protocol by using α-hydroxyesters as alcohol partners and aminoacid phthaloyl hydrazide derivatives as acidic partners. The direct conversion of the phthaloyl group into tert-butyloxycarbonyl can be performed in a three-stage one-pot protocol.
A large number of N-aminodipeptides compounds have been obtained via a Mitsunobu protocol performed in Solution or by solid-phase synthesis. The oligomerization of some of them has been studied in solution or on solid support leading to the formation of 1:1[alpha:alpha-N-amino]mers. (C) 2008 Elsevier Ltd. All rights reserved.
Preparation of Multiply Protected Alkylhydrazine Derivatives by Mitsunobu and PTC Approaches
Alkylation reactions of hydrazine derivatives by Mitsunobu or PTC approaches are described. It has been shown that aminophthalimide derivatives are better acidic partners than their aminoimidodicarbonate (NBoc2) analogues, the presence of the phthaloyl group increasing the acidity of the sole proton and concomitantly reducing steric hindrance. Moreover, N-aminophthalimide derivatives can be efficiently