Enantioselective synthesis of protected forms of (3R,5R)-5-hydroxypiperazic acid useful for synthesis
作者:Kristopher M. Depew、Theodore M. Kamenecka、Samuel J. Danishefsky
DOI:10.1016/s0040-4039(99)01958-9
日期:2000.1
Protected versions of (3R,SR)-5-hydroxypiperazic acid were synthesized enantioselectively in two novel ways. The first derives its chirality from D-glutamic acid while the second uses an Evans amination and a diastereoselective bromolactonization to establish the two chiral centers. Given that this amino acid is a component of several depsipeptides, these two routes enable the synthesis of multigram quantities of protected versions of 2. (C) 2000 Elsevier Science Ltd. All rights reserved.