Directed Metal (Oxo) Aliphatic C–H Hydroxylations: Overriding Substrate Bias
摘要:
The first general strategy for a directing effect on metal (oxo)-promoted C-H hydroxylations is described. Carboxylic acid moieties on the substrate overcome unfavorable electronic, steric, and stereoelectronic biases in C-H hydroxylations catalyzed by the non-heme iron complex Fe(PDP). In a demonstration of the power of this directing effect, C-H oxidation is diverted away from an electronically favored C-1 H abstraction/rearrangement pathway in the paclitaxel framework to enable installation of C-2 oxidation in the naturally occurring oxidation state and stereoconfiguration.
943. Aliphatic hydroxy-acids. Part I. Some sapogenin degradation products
作者:R. Brettle、F. S. Holland
DOI:10.1039/jr9620004836
日期:——
[EN] CYSTEINE PROTEASE INHIBITORS<br/>[FR] INHIBITEURS DE CYSTEINE PROTEASES
申请人:CORTECH INC.
公开号:WO1999054317A1
公开(公告)日:1999-10-28
(EN) The present invention relates to cysteine protease inhibitors of general formula (I) wherein Z is a cysteine protease binding moiety; X and Y are S, O or optionally substituted N; and R1 is optionally substituted alkyl or aryl.(FR) La présente invention concerne des inhibiteurs de cystéine protéases de formule générale (I), dans laquelle Z est une fraction de liaison des cystéine protéases; X et Y représentent S, O ou N éventuellement substitué; et R1 représente un alkyle ou un aryle éventuellement substitué.