1362169-08-1Relevant articles and documents
Chiral squaramide catalyzed synthesis of C4 substituted chiral pyrazol-3-ol derivatives via a facile asymmetric Michael addition of 3-methyl-2-pyrazolin-5-one to β-nitrostyrenes
Rao, Kadiyala Srinivasa,Ramesh, Pambala,Trivedi, Rajiv,Kantam, M. Lakshmi
supporting information, p. 1227 - 1231 (2016/03/01)
Asymmetric Michael addition of 3-methyl-2-pyrazolin-5-one to β-nitrostyrenes, catalyzed by a series of chiral squaramide bifunctional catalysts derived from cinchona alkaloids, yielded chiral pyrazol-3-ol derivatives. These pyrazol-3-ol derivatives were o
First example of quinine-squaramide catalyzed enantioselective addition of diphenyl phosphite to ketimines derived from isatins
George, Jimil,Sridhar,Reddy, B.V. Subba
supporting information, p. 1595 - 1602 (2014/03/21)
A highly enantioselective addition of diphenyl phosphite to ketimines derived from isatins has been achieved using a bifunctional organocatalyst, quinine-derived squaramide catalyst. This method works efficiently with several ketimines to produce the corresponding 3-amino-2-oxoindolin-3-yl-phosphonates in excellent yields with high enantioselectivity (up to 98% ee). This journal is The Royal Society of Chemistry 2014.