Silanes in organic synthesis. 21. Configurational stability of the 2,2-diphenyl-1-(trimethylsilyl)cyclopropyl carbanion and free radical. Absolute stereochemical assignments to select silylcyclopropanes
Reaction of methyl 3-trimethylsilylpropenates with diazoalkanes. A facile 1,2-trimethylsilyl group migration within 3-carbomethoxy-4-trimethylsilyl-1-pyrazolines