Enantioselective Organocatalytic Michael Addition of Nitroalkanes and Other Nucleophiles to β-Trifluoromethylated Acrylamides
摘要:
An organocatalytic asymmetric Michael addition of nitroalkanes to trifluoromethylated acrylamides in good yields and with good to excellent diastereoselectivities and excellent enantioselectivities is described. The Michael adducts could be readily transformed into optically pure trifluoromethylated gamma-aminobutyric acid 7 in high yields without loss in enantioselectivities.
Bifunctional Iminophosphorane‐Catalyzed Enantioselective Nitroalkane Addition to Unactivated α,β‐Unsaturated Esters
作者:Daniel Rozsar、Alistair J. M. Farley、Iain McLauchlan、Benjamin D. A. Shennan、Ken Yamazaki、Darren James Dixon
DOI:10.1002/anie.202303391
日期:——
The first intermolecular enantioselectiveaddition of nitroalkanes to unactivated α,β-unsaturated esters is described, catalyzed by a bifunctional iminophosphorane (BIMP) superbase. This fundamental synthetically relevant transformation proceeds with high enantiomeric excesses and yields over a wide range of feedstock substrates, providing pharmaceutically relevant building blocks in a single step
Enantioselective Organocatalytic Michael Addition of Nitroalkanes and Other Nucleophiles to β-Trifluoromethylated Acrylamides
作者:Lele Wen、Liang Yin、Qilong Shen、Long Lu
DOI:10.1021/cs300806w
日期:2013.4.5
An organocatalytic asymmetric Michael addition of nitroalkanes to trifluoromethylated acrylamides in good yields and with good to excellent diastereoselectivities and excellent enantioselectivities is described. The Michael adducts could be readily transformed into optically pure trifluoromethylated gamma-aminobutyric acid 7 in high yields without loss in enantioselectivities.