Reaction of Cyclic α-Oxoketene Dithioacetals with Methylene Isocyanides: A Novel Pyrrole Annulation–Ring-Expansion Domino Process
作者:Somaraju Yugandar、Nimesh C. Misra、Gangajji Parameshwarappa、Kausik Panda、Hiriyakkanavar Ila
DOI:10.1021/ol402469v
日期:2013.10.18
The title reaction provides a direct entry to a range of biologically relevant annulated pyrroles via a domino process involving a regioselective one-carbon homologation of cyclic ketones as the key step.
Heteroaromatic annulation studies on 10,11-dihydro-11-[bis(methylthio)methylene]dibenzoxepin-10-one: a facile access to novel dibenzoxepino[4,5]-fused heterocycles
10,11-Dihydro-11-[bis(methylthio)methylene]dibenzoxepin-10-one has been shown to be a useful three carbon synthon for the efficient regiospecific annulation of a variety of five- (pyrazoles, isoxazoles, thiophene, and γ-lactone) and six-membered (pyrimidines, pyridone and pyridines) heterocycles by cyclocondensation with heterobinucleophiles such as hydrazine, hydroxylamine, dimethylsulfonium methylide