Generation, some synthetic uses, and 1,2-vinyl rearrangements of secondary and tertiary homoallyllithiums, including ring contractions and a ring expansion. Remarkable acceleration of the rearrangement by an oxyanionic group
作者:Boguslaw Mudryk、Theodore Cohen
DOI:10.1021/ja00063a001
日期:1993.5
addition of thiophenol to a conjugated enal or enone followed by a Wittig or Peterson olefination, (2) the reaction of a silyl enol ether with a diphenyl dithioacetal catalyzed by stannic chloride, followed by a Peterson olefination, or (3) the treatment of the lithioderivatives of phenyl thioethers or thioacetals or the corresponding cuprates with allyl halides
Cyclization of Olefinic Benzyl Ethers with Aryltellurium Trichlorides
作者:J. V Comasseto、M. V. A. Grazini
DOI:10.1080/00397919208020859
日期:1992.3
Abstract Olefinic benzyl ethers react with aryltellurium trichlorides leading to tetrahydrofurans in high yields. The reaction times and yields are similar to the analogous cyclization of the corresponding olefinic alcohols. The stereoselec-tivity of the transformation is low.