Biocatalysed synthesis of the enantiomers of the floral odorant Florhydral®
作者:Agnese Abate、Elisabetta Brenna、Claudia Dei Negri、Claudio Fuganti、Stefano Serra
DOI:10.1016/s0957-4166(02)00202-1
日期:2002.5
The two enantiomers of the floral odorant Florhydral(R) were prepared by enzymatic methods, and their olfactory properties were evaluated. (+)-Florhydral(R) was found to be Much more powerful than the (-)-enantionier. (C) 2002 Elsevier Science Ltd. All rights reserved.
Heck Reactions of Crotonaldehyde
作者:Benjamin List、Michael Stadler
DOI:10.1055/s-2008-1032095
日期:——
A direct method for the synthesis of β,β-disubstituted-α,β-unsaturated aldehydes via Heck reaction of aryl halides with crotonaldehyde and related substrates has been developed. The reaction provides rapid access to products usually prepared via multistep sequences. The power of the method in combination with an organocatalytic transfer hydrogenation is illustrated with a short asymmetric synthesis of (S)-Florhydral®.