Enantioselective hydrogenation of α,β-disubstituted nitroalkenes
作者:Shengkun Li、Kexuan Huang、Xumu Zhang
DOI:10.1039/c4cc03942d
日期:——
The first highly chemo- and enantioselective hydrogenation of α,β-disubstituted nitroalkenes was accomplished with rhodium/JosiPhos-J2 as a catalyst, with the yield and enantioselectivity of up to 95% and 94%, respectively. The α-chiral nitroalkanes will provide an entry to valuable chiral amphetamines which are otherwise not so easily accessed.
Highly selective: The reduction of α‐methyl‐substituted nitroalkenes succeeds in a highly enantioselective fashion with an ene reductase from Gluconobacter oxydans. Under optimized reaction conditions the desired nitroalkanes are formed with enantiomeric excesses of up to 95% in these biotransformations.
The Organic-Synthetic Potential of Recombinant Ene Reductases: Substrate-Scope Evaluation and Process Optimization
作者:Tina Reß、Werner Hummel、Steven P. Hanlon、Hans Iding、Harald Gröger
DOI:10.1002/cctc.201402903
日期:2015.4.20
In this study an evaluation of the synthetic potential of a broad range of recombinantenereductases was performed. In detail, a library of 23 enereductases was used to screen the CC reduction of 21 activated alkenes from different compound classes as substrates. The chosen set of substrates comprises nitroalkenes with an aryl substituent at the β‐position and a methyl substituent at the α‐ or β‐position