作者:Lawrence A. Reiter、Katherine E. Brighty、Rhonda A. Bryant、Miriam E. Goldsmith
DOI:10.1080/00397919608003504
日期:1996.4
A convenient method for the synthesis of mono N-substituted guanylthioureas in reasonable yields from readily available starting materials has been developed. In contrast to the previously published method, the use of highly noxious hydrogen sulfide is avoided. The method allows the rapid preparation of guanylthioureas since the synthesis of each requires only a single step from a common intermediate, the S-methylated derivative of dithiobiuret.
A series of 2-[(arylalkyl)guanidinol-4-[(5-acetamidomethyl)furan-2-yl]thiazoles and some 4-acetamidomethyl positional isomers were synthesized and evaluated for antimicrobial activity against Helicobacter pylori. Among the compounds that had potent antimicrobial activity (MIC < 0.1 mu g/mL), compounds 31 and 36 additionally possessed H2 antagonist and gastric antisecretory activities. Though compound 51, an analogue incorporating a methyl group onto the furan nucleus of 36, and compound 54, a positional isomer of 51, also showed potent anti-H. pylori activity, the H2 antagonism profile was eliminated from these compounds. Thus, two types of potent anti-H. pylori agents could be derived from the same scaffold.
Synthesis of selenoureas and selenothiocarbamic esters from thioureas
作者:Daniel L. Klayman、Robert J. Shine
DOI:10.1021/jo01263a070
日期:1969.11
Protease inhibitors
申请人:SmithKline Beecham Corporation
公开号:US05998470A1
公开(公告)日:1999-12-07
Disclosed herein is a compound of the formula ##STR1## known as 2-[N-(N-benzyloxycarbonyl-L-leucinyl)]-2'-[N'-[4-(N,N-dimethylaminomethyl) benzyloxy]carbonyl-L-leucinyl]carbohydrazide; and pharmaceutically acceptable salts, hydrates and solvates thereof.