2-lithio-2-phenylsulfonyl propane as efficient precursor of gem-dimethyl cyclopropane carboxylic acids
作者:A. Krief、M.J. De Vosa
DOI:10.1016/s0040-4039(00)95141-4
日期:1985.1
2-Lithio-2-phenylsulfonyl propane has been successfully used for the cyclopropanation of electrophilic olefins and plays the role of an alkylidene transer reagent.
Irradiation of methyl diazomalonate in solution. Reactions of singlet and triplet carbenes with carbon-carbon double bonds
作者:Maitland Jones、Wataru Ando、Michael E. Hendrick、Anthony Kulczycki、Peter M. Howley、Karl F. Hummel、Donald S. Malament
DOI:10.1021/ja00776a032
日期:1972.10
Dicarbomethoxycarbene. A Laser Flash Photolysis Study
作者:Jen-Lung Wang、John P. Toscano、Matthew S. Platz、Valerij Nikolaev、Vladimir Popik
DOI:10.1021/ja00125a007
日期:1995.5
Dimethyl diazomalonate (1) was studied by laser flash photolysis (LFP) techniques. LFP of 1 generates dicarbomethoxycarbene (2), which can be intercepted with pyridine to give a UV-vis active ylide. Analysis of the yield of ylide as a function of pyridine concentration provides estimates of the carbene lifetime in various solvents, of its rate constant for Wolff rearrangement, of its reaction with various quenchers, and of intersystem crossing.
Nitro compounds as nucleophilic alkylidene transfer reagents