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.
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.
Synthesis of Optically Active 2-Alkyl-3,4-iminobutanoic Acids. β-Amino Acids Containing an Aziridine Heterocycle
作者:Jeong-il Park、Guan Rong Tian、Dong H. Kim
DOI:10.1021/jo0014055
日期:2001.6.1
All four stereoisomers of 2-alkyl-3,4-iminobutanoic acid, a novel class of beta -amino acids bearing a chemically versatile aziridine ring, were synthesized starting with aspartic acid. The synthetic strategy involves the introduction of an alkyl group at the beta -position of fully protected optically active aspartic acid followed by the construction of an aziridine ring making use of the alpha -carboxylate and alpha -amino groups. The alpha -carboxylate was reduced to the corresponding alcohol, which was then subjected to cyclization to form an aziridine ring with the N-protected amino group. Removal of the protection groups yielded the target compounds.
Synthesis of optically active β-alkyl aspartate via [3,3] sigmatropic rearrangement of α-acyloxytrialkylsilane
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.