Aza- and oxacarbonylations of allyl phosphates catalyzed by rhodium carbonyl cluster. Selective synthesis of β, γ-unsaturated amides, esters, and acids
作者:Yasushi Imada、Ou Shibata、Shun-Ichi Murahashi
DOI:10.1016/0022-328x(93)83025-q
日期:1993.6
Rhodium-catalyzed carbonylation of allyl phosphates under CO (20 atm) at 50°C proceeds very efficiently in the presence of amines, alcohols, and water to give the corresponding β,γ-unsaturated amides, esters, and acids, respectively. These carbonylations occur with high regioselectivity at the less substituted carbon of allyl unit to give linear β,γ-unsaturated acid derivatives.
the highly regio- and enantioselective semihydrogenation of unsymmetrical α-diketones are two formidable challenges in the field of contemporary asymmetric (transfer) hydrogenation. In this work, we report the highly regio- and stereoselective asymmetric semi-transfer hydrogenation of unsymmetrical α-diketones through a unique DKR mode, which features the reduction of the carbonyl group distal from the
Synthesis of (4,8,2,3,2')--2' -hydroxyhexadecanoyl-9-methyl-4,8-sphingadiemine, the ceramide portion of the fruiting-inducing cerebroside in a basidiomycete , and its (2,3)-isomer
作者:Kenji Mori、Yuji Funaki
DOI:10.1016/s0040-4020(01)96632-3
日期:1985.1
Preparation of .beta.,.gamma.-unsaturated methyl esters from allylic alcohols