Synthesis of spirosystems by rhodium(II)-carbenoid CH insertion reactions
作者:Pompiliu S. Aburel、Kjell Undheim
DOI:10.1016/s0040-4039(98)00591-7
日期:1998.5
preparation of spiro[4,4]nonane-2,7-dione derivatives from open chain bis(α-diazoketones). The reactions proceed by an intramolecular Rh(II)-carbenoid insertion into a methylene CH bond yielding a cyclopentane which subsequently undergoes CH methine insertion and cyclopentyl spiroannulation.