Ds. Carter et Dl. Van Vranken, Metal-catalyzed ylide formation and [2,3] sigmatropic rearrangement of allyl sulfides with trimethylsilyldiazomethane, TETRAHEDR L, 40(9), 1999, pp. 1617-1620
Trimethylsilyldiazomethane is compared with ethyl diazoacetate for the rhod
ium, copper, and cobalt catalyzed formation and [2,3] rearrangement of ally
lsulfonium ylides. At room temperature, the reaction can be carried out usi
ng the allyl sulfide as the limiting reagent by slow addition of 3 equivale
nts of the diazo compound. Slightly better yields were obtained with trimet
hylsilyldiazomethane than with ethyl diazoacetate. (C) 1999 Elsevier Scienc
e Ltd. All rights reserved.