Enantioselective, catalytic allylation of ketones and olefins
申请人:Behenna C. Douglas
公开号:US20060084820A1
公开(公告)日:2006-04-20
Compounds containing a substituted or unsubstituted allyl group directly bound to a chiral carbon atom are prepared enantioselectively. Starting reactants are either chiral or achiral, and may or may not contain an attached allyloxycarbonyl group as a substituent. Chiral ligands are employed, along with transition metal catalysts. The methods of the invention are effective in providing enantioconvergent allylation of chiral molecules.
Catalytic Asymmetric Synthesis of Cyclic α-Allylated α-Fluoroketones
作者:J. Tunge、E. Burger、B. Barron
DOI:10.1055/s-2006-950265
日期:2006.10
This manuscript details the development of an asymmetric, palladium-catalyzed, decarboxylative coupling of fluoroenolates with allyl electrophiles.
该手稿详细介绍了氟烯醇盐与烯丙基亲电子试剂的不对称、钯催化、脱羧偶联的发展。
Synthesis of α-fluoroketones based on palladium-catalyzed Decar☐ylation reactions of allyl β-keto car☐ylates
作者:Isao Shimizu、Hirotoshi Ishii
DOI:10.1016/s0040-4020(01)80770-5
日期:1994.1
Fluorination of allyl beta-keto carboxylates using N-fluoro-2,4,6-pyridinium triflate gave allyl a-fluoro-a-keto carboxylates. Reaction of allyl alpha-fluoro-beta-keto carboxylates with formic acid in the presence of palladium-phosphine catalyst gave alpha-fluoro ketones. When the palladium-catalyzed reaction was carried out without formic acid, the decarboxylation-allylation took place to give alpha-fluoro-allylketones. Decarboxylation-dehydrogenation to afford alpha-fluoro-alpha,beta-unsaturated ketones was carried out with palladium catalysts in acetonitrile.
Deracemization of Quaternary Stereocenters by Pd-Catalyzed Enantioconvergent Decarboxylative Allylation of Racemic β-Ketoesters
作者:Justin T. Mohr、Douglas C. Behenna、Andrew M. Harned、Brian M. Stoltz
DOI:10.1002/anie.200502018
日期:2005.10.28
SHIMIZU, ISAO;ISHII, HIROTOSHI, CHEM. LETT.,(1989) N, C. 577-580