The catalytic effectiveness of ruthenium porphyrins for ylide generation in reactions of ethyl diazoacetate and diisopropyl diazomethylphosphonate with allylic amines, sulfides and iodides is described for the first time. These reactions result mainly in products of the [2,3]-sigmatropicrearrangement of intermediate allylic ylides.
Highly effective catalytic methods for ylide generation from diazo compounds. Mechanism of the rhodium- and copper-catalyzed reactions with allylic compounds
作者:Michael P. Doyle、William H. Tamblyn、Vahid Bagheri
DOI:10.1021/jo00338a008
日期:1981.12
Reactivity Enhancement for Chiral Dirhodium(II) Tetrakis(Carboxamidates)
作者:Michael P. Doyle、Wenhao Hu、Iain M. Phillips、Christopher J. Moody、Adrian G. Pepper、Alexandra G. Z. Slawin
Difluorinated Ligands from azetidinone-4-carboxylates and pyrrolidinone-5-carboxylate have been prepared, substituted onto dirhodium(II), and the reactivities and selectivities of the resulting catalysts have been examined. The fluorinated catalysts exhibit enhanced reactivity towards diazo decomposition but diminished enantioselectivities for cyclopropanation. Selectivity for ylide formation and rearrangement or Si-H insertion is enhanced or similar to that with unfluorinated analogues.
The Reaction between Diazoacetic Ester and Allylic Halides
作者:Donald D. Phillips
DOI:10.1021/ja01650a039
日期:1954.11
Enantiocontrol in the Generation and Diastereoselective Reactions of Catalytically Generated Oxonium and Iodonium Ylides. Metal-Stabilized Ylides as Reaction Intermediates
作者:Michael P. Doyle、David C. Forbes、Melissa M. Vasbinder、Chad S. Peterson