1446-84-0Relevant articles and documents
An easily recoverable and recyclable homogeneous polyester-based Pd catalytic system for the hydrogenation of α,β-unsaturated carbonyl compounds
Bartoli, Mattia,Rosi, Luca,Petrucci, Giorgio,Armelao, Lidia,Oberhauser, Werner,Frediani, Marco,Piccolo, Oreste,Rathod, Vikas Damu,Paganelli, Stefano
, p. 228 - 233 (2015/07/20)
Abstract Homogeneous catalysis is an efficient tool to carry out hydrogenation processes but the major drawback is represented by the separation of the expensive catalyst from the product mixture. In this view we prepared a polyester-based Pd catalytic system that offers the advantages of both homogenous and heterogeneous catalyses: efficacy, selectivity and recyclability. Here its application in the hydrogenation of selected α,β-unsaturated carbonyl compounds is described.
PROCESS FOR PREPARING HYDROCINNAMIC ALDEHYDES IN ENANTIOPURE OR ENANTIOMERICALLY ENRICHED FORM
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Page/Page column 35-36, (2010/12/17)
A process is described for preparing hydrocinnamic aldehydes in enantiopure or enantiomerically enriched form of Formula I, in which R is isopropyl or tert-butyl and R' is hydrogen, or R and R' when taken together are a methylenedioxolyl group, comprising the following steps: a) reacting the hydrocinnamic aldehyde of Formula I with the alcohol of Formula Il in enantiopure or enantiomerically enriched form to give the crystallized hemiacetal of Formula III, in which R, R' have the same meaning as Formula I and (*) indicates a stereogenic centre in the absence of a solvent or in one or more aprotic solvents or mixtures thereof with apolar solvents; b) recovering the hydrocinnamic aldehyde of Formula I in enantiopure or enantiomerically enriched form from the crystallized hemiacetal of Formula III and the aldehyde of opposite configuration in enantiopure or enantiomerically enriched form from the hemiacetal crystallization mother liquors. The invention also concerns a process for preparing the alcohol of Formula Il to be introduced into step a).
