Synthesis and growth-inhibitory activities of imidazo[5,1-d]-1,2,3,5-tetrazine-8-carboxamides related to the anti-tumour drug temozolomide, with appended silicon, benzyl and heteromethyl groups at the 3-position
Synthesis and growth-inhibitory activities of imidazo[5,1-d]-1,2,3,5-tetrazine-8-carboxamides related to the anti-tumour drug temozolomide, with appended silicon, benzyl and heteromethyl groups at the 3-position
Orally active .beta.-lactam inhibitors of human leukocyte elastase-1. Activity of 3,3-diethyl-2-azetidinones
作者:Shrenik K. Shah、Conrad P. Dorn、Paul E. Finke、Jeffrey J. Hale、William K. Hagmann、Karen A. Brause、Gilbert O. Chandler、Amy L. Kissinger、Bonnie M. Ashe
DOI:10.1021/jm00099a003
日期:1992.10
A thorough analysis of the mechanism of inhibition of human leukocyte elastase (HLE) by a monocyclic beta-lactam and the mechanism of beta-lactam hydrolysis led to the preparation of potent and highly stable inhibitors of HLE. This work led to the identification of 4-[(4-carboxyphenyl)-oxy]-3,3-diethyl-1-[[(phenylmethyl)amino]carbonyl]-2-azetidinone (2) as the first orally active inhibitor of human leukocyte elastase (HLE). Analogs of 2 with different substituents on the urea N were synthesized and evaluated for their activity in vitro against HLE as well as in vivo in a hamster lung hemorrhage model. Compounds with a methyl or a methoxy group in the para position of the benzene ring were very potent in both assays. The results are discussed on the basis of the proposed model for the binding of this class of inhibitors to HLE and a possible mechanism of inhibition is presented.
An efficient of Grignard-type procedure for the preparation of gem-diallylated compound
作者:Kao-Hsien Shen、Chun-Wei Kuo、Ching-Fa Yao
DOI:10.1016/j.tetlet.2007.07.008
日期:2007.9
An efficient and a new procedure for the conversion of various carboxylic acid derivatives into the corresponding gemdiallylated compound under mild reaction condition has been developed. The triallyaluminum mediated Grignard-type addition of carboxylic acid derivative was utilized as a key operation to affect the transformation. The procedure is operationally simple, giving good to excellent product yields for a broad range of substrates. The chemoselectivity and regioselectivity of triallylaluminum were also demonstrated. (C) 2007 Elsevier Ltd. All rights reserved.
US4147863A
申请人:——
公开号:US4147863A
公开(公告)日:1979-04-03
Synthesis and growth-inhibitory activities of imidazo[5,1-<i>d</i>]-1,2,3,5-tetrazine-8-carboxamides related to the anti-tumour drug temozolomide, with appended silicon, benzyl and heteromethyl groups at the 3-position
作者:David Cousin、Marc G. Hummersone、Tracey D. Bradshaw、Jihong Zhang、Christopher J. Moody、Magdalena B. Foreiter、Helen S. Summers、William Lewis、Richard T. Wheelhouse、Malcolm F. G. Stevens
DOI:10.1039/c7md00554g
日期:——
The synthesis and biological evaluation of imidazotetrazines substituted at N-3 is described.