Production of (
<i>S</i>
)‐β‐Nitro Alcohols by Enantioselective C−C Bond Cleavage with an
<i>R</i>
‐Selective Hydroxynitrile Lyase
作者:D. H. Sreenivasa Rao、Santosh Kumar Padhi
DOI:10.1002/cbic.201800416
日期:2019.2
Cleavage is faster than synthesis: AtHNL‐catalysed stereoselective retro‐Henry cleavage of racemic β‐nitro alcohols produced the corresponding S enantiomers by kineticresolution with up to 99 % ee and 47 % conversion in 3–7 h. This approach widens the application of AtHNL for the synthesis both of (R)‐ and also of (S)‐β‐nitro alcohols from the appropriate substrates.
Asymmetric Henry reaction catalyzed by Cu(I)-based chiral amino alcohol complex
作者:Tianhua SHEN、Quan QIN、Hang NI、Ting XIA、Xiaocong ZHOU、Funa CUI、Junqi LI、Deqiang RAN、Qingbao SONG
DOI:10.3906/kim-1210-62
日期:——
The Cu(I)-based complex prepared from (S)-2-(furan-2-yl-methylamino)-2-phenylethanol (5c) and CuCl was used as catalyst in enantioselective Henryreactions of arylaldehydes and nitromethane, which gave 89% ee and 95% yield at ambient temperature. The proposed catalytic cycle of an asymmetricHenryreaction was suggested.
Asymmetric henry reaction catalyzed by chiral schiff base
作者:De-qiang Ran、Tian-hua Shen、Xiao-cong Zhou、Jun-qi Li、Fu-na Cui、Chun-an Ma、Qing-bao Song
DOI:10.1134/s1070428013060080
日期:2013.6
Four chiral Schiff bases were synthesized conveniently from chiral amino alcohol and 2-hydroxynaphthalene-1-carbaldehyde. These ligands were used to catalyze the addition of nitroalkanes to aldehydes under ambient conditions in good yields with up to 91% ee.