Triphenylbismuth dibromide-iodine: An efficient reagent for the dehydration of alcohols
作者:Rosa L. Dorta、Ernesto Suárez、Carmen Betancor
DOI:10.1016/s0040-4039(00)73313-2
日期:1994.7
Tertiary and secondary alcohols react under mild conditions with triphenylbismuth dibromide and iodine under an inert atmosphere to give the corresponding most stable alkenes in good yields.
BF3·OEt2 promotes fast, mild, clean and regioselective dehydration of tertiary alcohols
作者:Gary H. Posner、Ellen M. Shulman-Roskes、Chang Ho Oh、Jean-Christophe Carry、Julianne V. Green、A.Brian Clark、Haiyan Dai、Tizah E.N. Anjeh
DOI:10.1016/0040-4039(91)80200-p
日期:1991.11
BF3.OEt2 in methylene chloride at 25-degrees-C for 2 hours or less is shown to be effective for easy conversion of tertiary alcohols into the corresponding thermodynamically most stable alkenes.
Regioselective radical cyclization initiated by the reaction of allylic hydroperoxides with iron(II) sulfate
FeSO4/CuCl2 yielded 1-(1-chlorocyclohexyl)ethanone as the major product consistent with 6-endo-trig cyclization of the intermediate 5-acetylhex-5-enyl radical. This strategy was extended to the ring enlargement of a series of 1-isopropenylcycloalkyl hydroperoxides. Regioselective 7- or 8-endo-trig cyclizationreactions could be achieved by treatment of the corresponding cyclopentyl or cyclohexyl hydroperoxides