Use of O,Se-Acetals for Radical-Mediated Phenylseleno Group Transfer Reactions
作者:Philippe Renaud、Sokol Abazi
DOI:10.1055/s-1996-4182
日期:1996.2
Ester substituted O,Se-acetals are very efficient radical precursors which can be used for intermolecular formation of C-C bonds via phenylseleno group transfer. The nucleophilic nature of the radical intermediates has been demonstrated and good yields were obtained with alkenes substituted by electron-withdrawing groups. Interestingly, the slow rate of phenylseleno group transfer permitted addition to nonactivated olefins. An intramolecular variant of this reaction provides a simple and efficient access to tetrahydrofuran derivatives.
Discovery of β-benzamido hydroxamic acids as potent, selective, and orally bioavailable TACE inhibitors
作者:James J.-W. Duan、Lihua Chen、Zhonghui Lu、Chu-Biao Xue、Rui-Qin Liu、Maryanne B. Covington、Mingxin Qian、Zelda R. Wasserman、Krishna Vaddi、David D. Christ、James M. Trzaskos、Robert C. Newton、Carl P. Decicco
DOI:10.1016/j.bmcl.2007.10.093
日期:2008.1
beta-Benzamido hydroxamic acids were discovered as potent TACE inhibitors. A computer model was constructed to help understanding the binding activities and guiding SAR study. SAR optimization led to the discovery of compound 30 which met all in vitro and in vivo criteria for the program and was selected for further evaluation. (C) 2007 Elsevier Ltd. All rights reserved.
NOELS, A. F.;DEMONCEAU, A.;PETINIOT, N.;HUBERT, A. J.;TEYSSIE, PH., TETRAHEDRON, 1982, 38, N 17, 2733-2739
作者:NOELS, A. F.、DEMONCEAU, A.、PETINIOT, N.、HUBERT, A. J.、TEYSSIE, PH.
DOI:——
日期:——
Stereoselectivity of intramolecular cyclisations of nitrones derived from 3-oxahept-6-enals
作者:Michael B. Gravestock、David W. Knight、Jennifer S. Lovell、Steven R. Thornton
DOI:10.1039/a905802h
日期:——
Intramolecular [1,3]-dipolar cycloadditions of nitrones 33, derived from 3-oxahept-6-enals 7, substituted at either the 4- or 5-position and prepared using a variety of approaches, give good to excellent yields of the cycloadducts 34–37, with good levels of stereoselectivity, especially when the substituent is adjacent to the alkene. The cyclisations appear to proceed via well-defined transition state conformations which should be of predictive value.