Migratory Dynamic Kinetic Resolution of Carbocyclic Allylic Alcohols
作者:Chicco Manzuna Sapu、Tamás Görbe、Richard Lihammar、Jan-E. Bäckvall、Jan Deska
DOI:10.1021/ol502979g
日期:2014.11.21
isomerization/racemization catalyst gives rise to carbocyclic allylic esters with excellent stereoselectivity from readily available tertiary carbinols. An easy-to-use teabag setup combining resin-bound catalysts, a biphasic isooctane–water solvent system, and a highly lipophilic acyl donor efficiently suppresses side reactions and allows for the preparation of functionalized carbocyclic building blocks in high yields
V for resolution: A new oxovanadium catalyst (V‐MPS; see scheme) immobilized in the pores of mesoporous silica has been developed. The combined use of V‐MPS and lipases achieved the dynamickineticresolution of a wide range of racemic alcohols (1 or 2) to produce optically active esters 3 in high chemical and optical yields. The paired catalysts retained high catalytic activity when reused up to six
Allylalcohols undergo oxidative cleavage, affording the corresponding carbonyl compounds in good yields, when treated with ozone–lead(IV) acetate under mild conditions.
IBS-Catalyzed Oxidative Rearrangement of Tertiary Allylic Alcohols to Enones with Oxone
作者:Muhammet Uyanik、Ryota Fukatsu、Kazuaki Ishihara
DOI:10.1021/ol9013188
日期:2009.8.6
A 2-iodoxybenzenesulfonic acid (IBS)-catalyzed oxidative rearrangement of tertiary allylic alcohols to enones with powdered Oxone in the presence of potassium carbonate and tetrabutylammonium hydrogen sulfate has been developed.