Phosphinic peptides were previously reported to be potent inhibitors of several matrixins (MMPs). To identify more selective inhibitors of MMP-11, a matrixin overexpressed in breast cancer, a series of phosphinic pseudopeptides bearing a variety of P-1'-side chains has been synthesized, by parallel diversification of a phosphinic template. The potencies of these compounds were evaluated against a set of seven MMPs (MMP-2, MMP-7, MMP-8, MMP-9, MMP-11, MMP-13, and MMP-14). The chemical strategy applied led to the identification of several phosphinic inhibitors displaying high selectivity toward MMP-11. One of the most selective inhibitors of MMP-11 in this series, compound 22, exhibits a K-i value of 0.23 PM toward MMP-11, while its potency toward the other MMPs tested is 2 orders of magnitude lower. This remarkable selectivity may rely on interactions of the P-1'-side chain atoms of these inhibitors with residues located at the entrance of the S-1'-cavity of MMP-11. The design of inhibitors able to interact with residues located at the entrance of MMPs' S-1'-cavity might represent an alternative strategy to identify selective inhibitors that will fully differentiate one MMP among the others.
Rundel,W., Chemische Berichte, 1968, vol. 101, p. 2956 - 2962
作者:Rundel,W.
DOI:——
日期:——
Preparation of New<i>tert</i>-Butyl Substituted Coumarins, Thiocoumarins and Dithiocoumarins
作者:Jürgen Voss、Ronald Edler、Gunadi Adiwidjaja
DOI:10.1080/10426500701340949
日期:2007.6.14
6-tert-Butyl-4-methyl- and 6,8-di-tert-butyl-4-methylcoumarin were prepared from tert-butylphenols and diketene via the corresponding aryl acetoacetates. 6-tertButyl-4-methyl-thiocoumarin (6) was obtained from 6-tert-butylthiophenol. Thionation with LAWESSON's or DAVY's reagent led to the related thion- and dithiocoumarins. The structures were proved by NMR spectroscopy and an X-ray structure analysis of 6.
Pohl, S.; Opitz, U.; Haase, D., Zeitschrift fur Anorganische und Allgemeine Chemie