Further reactions of t-butyl 3-oxobutanthioate and t-butyl 4-diethyl-phosphono-3-oxobutanthioate : Carbonyl coupling reactions, amination, use in the preparation of 3-acyltetramic acids and application to the total synthesis of fuligorubin A.
作者:Steven V. Ley、Stephen C. Smith、Peter R. Woodward
DOI:10.1016/s0040-4020(01)88210-7
日期:1992.1
for the preparation of homologated derivatives suitable for amination in the presence of silver (I) trifluoroacetate to afford the corresponding β-ketoamides is discussed. In particular Wadsworth-Emmons coupling reactions of (2) with various carbonyl compounds gave good yields of E-substituted products. Many of the β-ketoamides were shown to be suitable precursors for 3-acyltetramic acids using a Dieckmann
Asymmetric synthesis of RK-682 and its analogs, and evaluation of their protein phosphatase inhibitory activities
作者:Mikiko Sodeoka、Ruriko Sampe、Terumi Kagamizono、Hiroyuki Osada
DOI:10.1016/s0040-4039(96)02029-1
日期:1996.11
We report an asymmetric synthesis of a potent tyrosine phosphatase inhibitor, RK-682 and its analogs. The absolute stereochemistry of RK-682 was determined to be (R). The inhibitory activities of RK-682 and its analogs, (R)-1a, (S)-1a, (R)-1b and (R)-1c toward various protein phosphatases (MIR, cdc25A, cdc25B, and PP1) are also reported. Copyright (C) 1996 Elsevier Science Ltd
LEY S. V.; WOODWARD P. R., TETRAHEDRON LETT., 28,(1987) N 3, 345-346