Photoreductive cyclization of unsaturated aldehydes : An easy access to spiranic molecules
作者:J. Cossy、J.P. Pete、C. Portella
DOI:10.1016/s0040-4039(00)70697-6
日期:1989.1
The photoreductive cyclization of ω-unsaturated aldehydes is an efficient process which leads to substituted cycloalkanols. This process is used as a convenient approach to spiranic molecules.
ω-不饱和醛的光还原环化是导致取代的环烷醇的有效方法。此过程用作螺环分子的便捷方法。
Terminal Olefins to Chromans, Isochromans, and Pyrans via Allylic C–H Oxidation
作者:Stephen E. Ammann、Grant T. Rice、M. Christina White
DOI:10.1021/ja503322e
日期:2014.8.6
The synthesis of chroman, isochroman, and pyran motifs has been accomplished via a combination of Pd(II)/bis-sulfoxide C–H activation and Lewis acid co-catalysis. A wide range of alcohols are found to be competent nucleophiles for the transformation under uniform conditions (catalyst, solvent, temperature). Mechanistic studies suggest that the reaction proceeds via initial C–H activation followed by