Intramolecular Oxidative C−H Coupling for Medium-Ring Synthesis
作者:Didier G. Pintori、Michael F. Greaney
DOI:10.1021/ja1090854
日期:2011.2.9
An oxidative C-H coupling is described for medium-ring synthesis.
描述了用于中环合成的氧化 CH 偶联。
Dihydropyrimidine calcium channel blockers: 2-heterosubstituted 4-aryl-1,4-dihydro-6-methyl-5-pyrimidinecarboxylic acid esters as potent mimics of dihydropyridines
作者:Karnail S. Atwal、George C. Rovnyak、Joseph Schwartz、Suzanne Moreland、Anders Hedberg、Jack Z. Gougoutas、Mary F. Malley、David M. Floyd
DOI:10.1021/jm00167a035
日期:1990.5
2-Heterosubstituted-4-aryl-1,4-dihydro-6-methyl-5-pyrimidinecar box ylic acid esters 8, which lack the potential CS symmetry of dihydropyridine calcium channel blockers, were prepared and evaluated for biological activity. Biological assays using potassium-depolarized rabbit aorta and radioligand binding techniques showed that some of these compounds are potent mimics of dihydropyridine calcium channel blockers. The combination of a branched ester (e.g. isopropyl, sec-butyl) and an alkylthio group (e.g. SMe) was found to be optimal for biological activity. When compared directly with similarly substituted 2-heteroalkyldihydropyridines 9, dihydropyrimidines 8 were found to be 30-fold less active. The solid-state structure of dihydropyrimidine analogue 8g shows that these compounds can adopt a molecular conformation which is similar to the reported conformation of dihydropyridine calcium channel blockers.
Substituted 2,3-Dihydro-1,5-benzothiazepin-4(5H)-ones and 3,4-Dihydro-2-phenyl-(2H)-1,6-benzothiazocin-5(6H)-ones
作者:John Krapcho、Ervin R. Spitzmiller、Chester F. Turk