A process for the synthesis of β-ketoesters using in-situ generated (trimethylsilyl)malonates
作者:Xui Wang、William T. Monte、James J. Napier、Ameen Ghannam
DOI:10.1016/s0040-4039(00)78532-7
日期:1994.12
(TMS)ethylmalonate can be generated in-situ by treating potassium ethylmalonate with trimethylsilyl chloride and acylated with aliphatic or aromatic acyl imidazoles or chlorides in the presence of DBU to prepare a variety of β-ketoesters. This constitutes a high yield method for preparing β-ketoesters, which also can be extended to the formation of alkylidene malonates.
作者:Huang, Danwen、Matile, Stefan、Berova, Nina、Nakanishi, Koji
DOI:——
日期:——
An Enantioselective Synthesis of Differentially Protected <i>erythro</i>-α,β-Diamino Acids and Its Application to the Synthesis of an Analogue of Rhodopeptin B5
作者:Timothy B. Durham、Marvin J. Miller
DOI:10.1021/jo016276m
日期:2003.1.1
Methodology for the enantioselective synthesis of differentially protected erythro-alpha,beta-diamino acids from N-tosyloxy beta-lactams is reported. The requisite N-tosyloxy beta-lactams are readily available from simple beta-keto esters. The reported approach is flexible and compatible with a variety of functional groups. The synthetic utility of the method is demonstrated through its application to the preparation of an analogue of the antifungal cyclic peptide rhodopeptin B5.