Chemoselective Biohydrogenation of Alkenes in the Presence of Alkynes for the Homologation of 2‐Alkynals/3‐Alkyn‐2‐ones into 4‐Alkynals/Alkynols
作者:Danilo Colombo、Elisabetta Brenna、Francesco G. Gatti、Maria Chiara Ghezzi、Daniela Monti、Fabio Parmeggiani、Francesca Tentori
DOI:10.1002/adsc.201900177
日期:——
activated alkene bonds by ene‐reductases (ERs) is completely chemoselective, because of the mechanism of the reaction. Thus, we investigated the use of ERs belonging to the Old Yellow Enzyme family for the reduction of α,β‐unsaturated aldehydes with a conjugated C≡C triple bond at the γ position. This reaction was exploited as the key step for the development of an effective homologation route to convert
Diastereoselective protonation of dienols: a formal approach to zaragozic acid C side chain
作者:Sébastien Comesse、Olivier Piva
DOI:10.1016/s0957-4166(99)00102-0
日期:1999.3
The 2-methyl 5-phenylpropanal precursor of the side chain of zaragozic acid C has been prepared in 83% ee through the diastereoselective protonation of a photodienol generated in situ by irradiation of an alpha, beta-unsaturated ester, bearing, as a chiral moiety, the diacetone D-glucose group. (C) 1999 Elsevier Science Ltd. All rights reserved.