An efficient synthesis of 2-chloro-3-carboethoxy- or 2-chloro-3-cyano- 4,5-disubstituted and 5-substituted pyrroles
作者:Louise H. Foley
DOI:10.1016/0040-4039(94)88056-5
日期:1994.8
Reaction of substituted 2-cyano-4-oxo-alkanoic acid ethyl esters or 2-cyano-4-oxo-alkanonitriles with HCl gas in 2-propanol or concentrated HCl in 2-propanol for the dinitriles provides an efficientsynthesis of substituted 2-chloropyrroles from readily available starting materials and reagents.
Selective Synthesis of Unsymmetrical Peroxides: Transition-Metal-Catalyzed Oxidation of Malononitrile and Cyanoacetic Ester Derivatives by tert-Butyl Hydroperoxide at the α-Position
malononitrile and cyanoaceticester derivatives at the α-position based on transition-metal-catalyzed reaction (Cu, Fe, Mn, Co) with tert-butyl hydroperoxide giving unsymmetrical peroxides in 63-94% yields. The method is facile, does not require large excesses of reagents, and is amenable to gram-scale synthesis. peroxides - tert-butyl hydroperoxide - catalysis - oxidation - transition metals - malononitrile
An efficient synthesis of 3-acylcarbazoles and observations on the further elaboration of these compounds to 6h-pyridocarbazoles
作者:Iain Hogan、Paul Jenkins、Malcolm Sainsbury
DOI:10.1016/s0040-4039(00)82385-0
日期:1988.1
A new procedure for the synthesis of 3-acylcarbazoles useful for the construction of 6H-pyrido[4,3-b]carbazoles is described starting from readily available gramines, or indoles. This methodology is exemplified by a synthesis of the anticancer alkaloid olivacine. Some discrepancies are noted between our results and those of other authors.