Synthesis and reactivity of N-alkyl-2-oxoalkanesulfonamides
作者:Juan A. Vega、Ramón Alajarín、Juan J. Vaquero、Julio Alvarez-Builla
DOI:10.1016/s0040-4020(98)00093-3
日期:1998.4
A series of N-alkyl-2-oxoalkanesulfonamides have been synthesized by reacting silyl enol ethers with N-alkyl-sulfamoyl chlorides. Their reactivity towards electrophiles was investigated in order to explore the regio-and stereoselectivity of the process. 2-Oxoalkanesulfonamides were used to prepare 5-(methylsulfamoyl)-1,4-dihydropyridines derivatives. (C) 1998 Elsevier Science Ltd. All rights reserved.
A straightforward synthesis of 5-sulfonamidomethyl substituted 4,7-dihydroazolo[1,5-<i>a</i>]pyrimidines
作者:Elena H. Shvets、Anastasiia V. Pidvorotnia、Olesia G. Kulyk、Alexander V. Mazepa、Maksim A. Kolosov
DOI:10.1080/00397911.2020.1821224
日期:2021.1.2
4,7-Dihydroazolo[1,5-a]pyrimidin-5-ylmethanesulfonamides are side-products of the three-component Biginelli-like reaction of aminoazoles, aldehydes and N,N-dialkyl-2-ketomethanesulfonamides. Herein...
Dihydropyridine derivatives of the formula ##STR1## wherein the symbols R and R.sup.1 to R.sup.6 have the significance given in claim 1, have a pronounced calcium-antagonist activity and can accordingly be used as medicaments, especially in the control or prevention of angina pectoris, ischemia, high blood pressure and/or migraine. The compounds of formula I can be prepared by reacting an ylidene compound of the formula ##STR2## with an enamine of the formula ##STR3##