Novel Series of O-substituted 8-quinolines and 4-benzothiazoles as potent antagonists of the bradykinin B2 receptors
作者:Holger Heitsch、Adalbert Wagner、Bernward A Schölkens、Klaus Wirth
DOI:10.1016/s0960-894x(98)00736-7
日期:1999.2
The synthesis and the SAR study of novel O-substituted 8-quinolines and 4-benzothiazoles as highly potentnon-peptidebradykininB2receptorantagonists are described. Several members of this series of antagonists efficiently inhibited the BK-induced vasoconstriction on different isolated organ preparations.
A Convenient and Inexpensive Method for Conversion of Thiocarbonyl Compounds to Their Oxo Derivatives Using Oxone Under Solvent-Free Conditions
作者:Iraj Mohammadpoor-Baltork、Majid M. Sadeghi、Karim Esmayilpour
DOI:10.1081/scc-120016359
日期:2003.1.4
Abstract A series of thioamides, thioureas and thioesters are transformed to their corresponding carbonyl compounds in good to excellent yields with oxone under solid phase conditions, while thioketones remained unchanged under these conditions.
Efficient and Convenient Deprotection of Thiocarbonyl to Carbonyl Compounds Using 3-Carboxypyridinium and 2,2'-Bipyridinium Chlorochromates in Solution, Dry Media, and under Microwave Irradiation
deprotection reactions is reported. Different types of thioamides, thioureas, thiono esters, and thioketones are deprotected to their corresponding carbonyl compounds with these reagents in good to excellent yields. The reactions were carried out in solution, under solvent-free conditions, and under microwave irradiation. The results show that with both reagents the rates of the reactions and the yields
Bismuth(III) nitrate pentahydrate: a convenient and selective reagent for conversion of thiocarbonyls to their carbonyl compounds
作者:Iraj Mohammadpoor-Baltork、Mohammad Mehdi Khodaei、Kobra Nikoofar
DOI:10.1016/s0040-4039(02)02516-9
日期:2003.1
A variety of thioamides and thioureas are rapidly transformed to their oxoderivatives with Bi(NO3)3·5H2O in excellent yields. However, thiono esters and thioketones are converted to their corresponding carbonyl compounds in only poor yields. Bi(NO3)3·5H2O is relatively non-toxic, insensitive to air and inexpensive. These features coupled with the selective deprotection of thioamides and thioureas
An aerobic visible-light driven photoredox catalytic formation of 2-substitutedbenzothiazoles through radical cyclization of thioanilides has been accomplished. The reaction features C–H functionalization and C–S bond formation with no direct metal involvement except the sensitizer. The reaction highlights the following: (1) visible-light is the reaction driving force; (2) molecular oxygen is the