Enantioselective Cascade Formal Reductive Insertion of Allylic Alcohols into the C(O)–C Bond of 1,3-Diketones: Ready Access to Synthetically Valuable 3-Alkylpentanol Units
An unprecedented cascade reaction combining dual iron–amine-catalyzed enantioselectivefunctionalization of allylicalcohols and chemoselective acyl transfer is presented. It allows, from diketones and allylicalcohols, preparation of efficiently functionalized γ-chiral alcohols in up to 96% yield and 96:4 er. The interest of this redox-, atom-, and step-economomical approach was further demonstrated
Photoredox Reaction of 2-Mercaptothiazolinium Salts with Silyl Enol Ethers
作者:Artem A. Zemtsov、Salavat S. Ashirbaev、Vitalij V. Levin、Vladimir A. Kokorekin、Alexander A. Korlyukov、Alexander D. Dilman
DOI:10.1021/acs.joc.9b02478
日期:2019.12.6
of free radicals from thiazolinium salts upon photocatalytic reduction is described. The thiazolinium salts are generated by treatment with methyl triflate of 2-mercaptothiazolines, which can be readily obtained from alkyl bromides and tosylates via a nucleophilic substitution reaction or by hydrothiolation of alkenes. Silyl enol ethers were used to trap the radicals, furnishing ketones after successive
Pet Container and Compositions Having Enhanced Mechanical Properties and Gas Barrier Properties and Methods
申请人:The Coca-Cola Company
公开号:US20150045482A1
公开(公告)日:2015-02-12
A container comprising a polyester composition with enhanced mechanical properties is provided. The polyester composition comprises a polyester and a creep control agent. In particular embodiments, the polyester composition comprises a polyester, a creep control agent, and a gas barrier enhancing additive. In particular embodiments, the creep control agents are molecules or polymers comprising dianhydrides, bis-lactams, bis-oxazoles, and epoxides.