Bleomycin analogs. Phenylthiazole models of the bithiazole moiety of bleomycin A2
作者:James M. Riordan、Ted T. Sakai
DOI:10.1021/jm00360a018
日期:1983.6
analogues was further indicated by viscometric measurements using calf thymus DNA. The data show that a phenyl ring allows the aromatic systems to interact with the base pairs of the polynucleotide to a greater extent than a thiazole ring in the same position. Possible models for the interaction of these derivatives with DNA are considered. The hydrogens of the biphenyl derivative show an interaction
Bleomycin analogs. Synthesis and proton nmr spectral assignments of thiazole amides related to bleomycin a<sub>2</sub>
作者:James M. Riordan、Ted T. Sakai
DOI:10.1002/jhet.5570180629
日期:1981.10
The synthesis of a series of 2-substituted thiazole-4-carboxamides of 3-aminopropyldimethylsulfonium chloride is described and the proton nmr spectral assignments of these derivatives are made. The compounds, which are fragments and analogs of the DNA-binding portion of the antitumor antibiotic bleomycin A2, will serve as probes of structure-activity relationships in this family of drugs.
a 4-(2,2,6,6-tetramethyl-1-piperidinooxy) free radical, have been synthesized. These derivatives where the nitroxide group is linked to the end of spacers of various lengths, can be used as probes for the study, by esr spectroscopy, of the intercalation of the heterocyclic moiety of Bleomycin.
The synthesis of three 2,4′-bithiazole derivatives related to the antibiotic antitumor bleomycin is reported. These compounds substituted by aminoalkyl chains on 2′ and/or 4-positions were prepared by the Hantzs synthesis between new thioamides and methyl 2-(2-bromoacetyl)thiazole-4-carboxylate and will be useful for the study of the intercalative moiety of bleomycin.
Chemistry of micrococcin P. Part VII. Dimethyl micrococcinate and some synthetic pyridine–polythiazole carboxylic esters
作者:R. J. Clark、James Walker
DOI:10.1039/j39660001354
日期:——
Dimethylmicrococcinate is shown to have the molecular formula C24H17N5O5S4 and to consist probably of a pyridine ring and four thiazole rings with two ester functions, a carbonyl group, and an ethyl group. The ultraviolet absorption spectra of dimethylmicrococcinate and of 2,6-bis-(4′-methoxycarbonyl-2′,4-bithiazolyl-2-yl)pyridine show striking similarity in alcoholic and acid solutions.
显示出微球菌酸二甲酯具有分子式C 24 H 17 N 5 O 5 S 4,并且可能由吡啶环和四个具有两个酯官能团,羰基和乙基的噻唑环组成。微球菌酸二甲酯和2,6-双-(4'-甲氧基羰基-2',4-bithiazolyl-2-yl)吡啶的紫外吸收光谱在醇溶液和酸溶液中显示出惊人的相似性。