Fluorous Dimethyl Sulfide: A Convenient, Odorless, Recyclable Borane Carrier
作者:David Crich、Santhosh Neelamkavil
DOI:10.1021/ol026957j
日期:2002.11.1
Borane gas and 2-(perfluorooctyl)ethyl methyl sulfide form a solid comprised of an approximately 1:1 mixture (fluorous BMS) of sulfide and the corresponding sulfide-borane. Fluorous BMS permits hydroboration of alkenes in a dichloromethane/perfluorinated hydrocarbon mixture with subsequent recycling of the fluorous sulfide by fluorous extraction. The use of fluorous BMS in the asymmetric reduction
Tandem Polar/Radical Crossover Sequences for the Formation of Fused and Bridged Bicyclic Nitrogen Heterocycles Involving Radical Ionic Chain Reactions, and Alkene Radical Cation Intermediates, Performed under Reducing Conditions: Scope and Limitations
anion contact ion pairs which are trappedintramolecularly in a tandem polar/radical crossover sequence involving radical ionic chain reactions by allylic and propargylic amines. The substitution pattern of the alkene radical cation dictates the cyclization mode, and this may be engineered to form fused ring systems by an initial exo-mode nucleophilic cyclization or bridged bicyclic systems when the nucleophilic
[EN] METHOD OF HYDROBORATING ALCOHOLS AND REDUCING FUNCTIONAL GROUPS USING A RECYCLABLE FLUOROUS BORANE-SULFIDE<br/>[FR] PROCEDE D'HYDROBORATION D'ALCOOLS ET DE REDUCTION DE GROUPES FONCTIONNELS AU MOYEN D'UN BORANE-SULFURE FLUORE RECYCLABLE
申请人:UNIV ILLINOIS
公开号:WO2004011472A3
公开(公告)日:2004-07-08
Synthesis of alkyl nitronates via Mitsunobu condensation
作者:J.R. Falck、Jurong Yu
DOI:10.1016/s0040-4039(00)61760-4
日期:1992.11
Nitroalkanes bearing electron-withdrawing or unsaturated substituents at the alpha-carbon experience exclusive intra- and intermolecular 0-alkylation by alcohols under Mitsunobu condensation conditions furnishing good to excellent yields of alkyl nitronates; in contrast, 1-phenylsulphonyl-1-nitro-3-propanol affords mainly the corresponding cyclopropane.
4,5,6H-oxazine-1,2 N-oxides in the 1,3-cycloaddition reaction
作者:I. E. Chlenov、V. I. Khudak、L. N. Kolymagina、N. S. Morozova、V. A. Tartakovskii