Highly Efficient Ytterbium Triflate Catalyzed Michael Additions of α-Nitroesters in Water
作者:Erik Keller、Ben Feringa
DOI:10.1055/s-1997-5761
日期:1997.7
Michaeladditions of alpha-nitroesters with enones and alpha,beta-unsaturated aldehydes result in quantitative conversions to the corresponding 1,4-adducts by performing the reactions in water in the presence of ytterbiumtriflate as water-tolerant Lewis acid.
Allylic alkylations catalyzed by the couple palladium complexes-alumina
作者:D. Ferroud、J.P. Genet、J. Muzart
DOI:10.1016/s0040-4039(01)81443-x
日期:1984.1
Using both palladium complexes and alumina, nucleophilic substitution of allyl acetate by various nucleophiles (pKa = 5–13) are realized with good yields at room temperature without preformation of the corresponding carbanions.
Method for producing polydienes and polydiene copolymers with reduced cold flow
申请人:Bridgestone Corporation
公开号:US10364300B2
公开(公告)日:2019-07-30
A method for preparing a coupled polymer, the method comprising the steps of polymerizing monomer to form a reactive polymer and reacting the reactive polymer with a carboxylic or thiocarboxylic ester containing a nitro group, where the carboxylic or thiocarboxylic ester containing a nitro group includes a single nitro group.