Synthesis of optically active β-alkyl aspartate via [3,3] sigmatropic rearrangement of α-acyloxytrialkylsilane
摘要:
The synthesis of four types of optically active beta-carbon-substituted analogs of threo-beta-hydroxy aspartate (THA) and a beta-carbon- substituted analog of threo-beta-benzyloxy aspartate (TBOA), which are potent blockers of excitatory amino acid transporters in the mammalian central nervous system, via the chirality-transferring ester-enolate Claisen rearrangement of alpha-acyloxytrialkylsilane is described. (C) 2004 Elsevier Ltd. All rights reserved.
The total synthesis of cyclomarin C was accomplished through a convergent strategy from a tetrapeptide fragment and a tripeptide one. The developed methods to prepare the needed noncoded amino acids, the proper protection of peptide fragments, and identification of the optimum macrocylization site can be applied to further synthetic studies on other members of cyclomarins.
Stereoselective synthesis of the dihydroxyisoleucine constituent of the amanita mushroom toxins
作者:Paul A. Bartlett、Donna J. Tanzella、James F. Barstow
DOI:10.1016/s0040-4039(00)86905-1
日期:1982.1
Ester-enolateClaisenrearrangement of -croytl N--Boc-glycinate and iodolactonization of the N-phthaloyl derivative of the resulting unsaturated acid are used as the stereocontrolling steps in a synthesis of the title compound.
-croytl N --Boc-甘氨酸的酯-烯酸酯克莱森重排和所得不饱和酸的N-邻苯二甲酰基衍生物的碘内酯化用作标题化合物合成中的立体控制步骤。