Carbonyliron Complexation and Carbonyl Insertion of Allenic Ketones
作者:Latchezar S. Trifonov、Alexander S. Orahovats、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.19920750613
日期:1992.10.2
The allenic α-ketones 5a–f give, on irradiation in the presence of [Fe(CO)5], the bis(tricarbonyliron) complexes 6a–f. In the case of ketone 5e, a minor bis(tricarbonyliron) complex with the proposed unique structure 8 is also obtained. Ketones 5a–d, which are disubstituted at C(4), under the same conditions, afford also the lactones 7a–d in moderate yields. The latter reaction is a new carbonyliron-mediated
Rhodium(<scp>ii</scp>)-catalysed generation of cycloprop-1-en-1-yl ketones and their rearrangement to 5-aryl-2-siloxyfurans
作者:Kostiantyn O. Marichev、Yi Wang、Alejandra M. Carranco、Estevan C. Garcia、Zhi-Xiang Yu、Michael P. Doyle
DOI:10.1039/c8cc05623d
日期:——
Donor–acceptor cyclopropenes formed from enoldiazoketones undergo catalytic rearrangement to 5-aryl-2-siloxyfurans via a novel mechanism that involves a nucleophilic addition of the carbonyl oxygen to the rhodium-activated cyclopropene.