936699-54-6Relevant articles and documents
(R)-(+)-N-Methylbenzoguanidine ((R)-NMBG) catalyzed acylative kinetic resolution of racemic 3-hydroxy-3-aryl-propanoates
Yamada, Akira,Nakata, Kenya
, p. 4697 - 4701 (2016)
(R)-(+)-N-methylbenzoguanidine ((R)-NMBG) functioned as an efficient acyl transfer catalyst for the acylative kinetic resolution of racemic β-hydroxy esters using cyclohexane carboxylic anhydride under mild reaction conditions. A tert-butyl ester moiety is necessary to achieve a high selectivity. The effects of the substituents on the aromatic rings of the substrates were systematically investigated, and diverse substrates participated in the reaction with good s-values (>20) irrespective of the type of substituents and their patterns, except for o-methoxy group.
Asymmetric dehydration of β-hydroxy esters and application to the syntheses of flavane derivatives
Choi, Eui Ta,Lee, Min Hee,Kim, Yongtae,Park, Yong Sun
, p. 1515 - 1522 (2008/09/18)
Catalytic asymmetric dehydration of β-aryl or alkyl substituted β-hydroxy esters via kinetic resolution has been investigated. A brief survey of 10 different chiral ligands is conducted to examine the effects of chiral ligand structure on selectivity of t
Asymmetric dehydration of β-hydroxy esters via kinetic resolution
Kim, Yongtae,Choi, Eui Ta,Lee, Min Hee,Park, Yong Sun
, p. 2833 - 2835 (2007/10/03)
Catalytic asymmetric dehydration of β-hydroxy esters via kinetic resolution has been investigated. The kinetic resolution of rac-β-hydroxy esters in the presence of prolinol chiral ligand 2a and BrZnCH2CO2t-Bu can provide highly enan
D-Phg-L-Pro Dipeptide-derived prolinol ligands for highly enantioselective Reformatsky reactions
Shin, Eun-Kyoung,Kim, Hyun Jung,Kim, Yongtai,Kim, Yangmee,Park, Yong Sun
, p. 1933 - 1935 (2007/10/03)
Optically pure N-aminoethyl prolinol derivatives 3a-c have been prepared from the dynamic kinetic resolution of N-(α-bromo-α-phenylacetyl) proline ester 1 in asymmetric nucleophilic substitution and subsequent reduction. The peptide-derived prolinols are