Synthesis of constrained α-amino acid derivatives via enyne metathesis reaction
摘要:
Synthesis of a diene building block via enyne metathesis reaction and its usage in the preparation of constrained alpha-amino acid derivatives is described. (C) 1998 Elsevier Science Ltd. All rights reserved.
Ethyl N-(diphenylmethylene)glycinate as anionic glycine equivalent. Monoalkylation, dialkylation and Michael additions under solid-liquid phase-transfer catalysis
additions to ethylenic and acetylenic acceptors under appropriate solid-liquid phase transfer catalysis conditions. Further transformations of the α-disubstituted ketimines lead to α-alkylated aspartic and glutamic acid derivatives 10, 15, 19 and 26, to bicyclic amino acids or derivatives featuring pyrazolone and isoxazolone moieties 30 and 33, and to α-substituted (E)-3,4-dehydroglutamic acids.
Synthesis of a diene building block via enyne metathesis reaction and its usage in the preparation of constrained alpha-amino acid derivatives is described. (C) 1998 Elsevier Science Ltd. All rights reserved.
Constrained Phenylalanine Derivatives by Enyne Metathesis and Diels−Alder Reaction
approach for the synthesis of indane-based α-amino acid derivatives is reported. In this regard, the synthesis of five-membered exocyclic and five-membered inner-outer ring diene building blocks (7 and 15) containing α-amino acid moieties is described. Diene 15 is prepared by an enyne metathesis reaction as a key step. In this paper, a full account of our work regarding the Diels-Alderreaction of these dienes