Kinetic Resolution of Racemic 1-Heteroarylalkanols by Asymmetric Esterification Using Diphenylacetic Acid with Pivalic Anhydride and a Chiral Acyl-transfer Catalyst
作者:Isamu Shiina、Keisuke Ono、Kenya Nakata
DOI:10.1246/cl.2011.147
日期:2011.2.5
A variety of optically active 1-heteroarylalkanols and their esters, which include heteroaromatic moieties, such as 2-furyl, 2-thienyl, 3-thienyl, 2-thiazoyl, 2-benzothiazoyl, and 2-benzoxazoyl gro...
A Highly Active Manganese Catalyst for Enantioselective Ketone and Ester Hydrogenation
作者:Magnus B. Widegren、Gavin J. Harkness、Alexandra M. Z. Slawin、David B. Cordes、Matthew L. Clarke
DOI:10.1002/anie.201702406
日期:2017.5.15
A newhydrogenationcatalyst based on a manganese complex of a chiral P,N,N ligand has been found to be especially active for the hydrogenation of esters down to 0.1 mol % catalyst loading, and gives up to 97 % ee in the hydrogenation of pro‐chiral deactivated ketones at 30–50 °C.
Optically pure bulky (hetero)arylalkyl carbinols via kinetic resolution
作者:Bin Hu、Meng Meng、John S. Fossey、Weimin Mo、Xinquan Hu、Wei-Ping Deng
DOI:10.1039/c1cc14591f
日期:——
Planar chiral nucleophilic catalyst Fc-PIP was employed in the kineticresolution of bulky (hetero)arylalkyl carbinols delivering unreacted alcohols with extremely high enantiomeric excess (>99.0% ees) in ideal conversions ranging from 50.4-56.7%.