133263-87-3Relevant academic research and scientific papers
Rhodium(I)-catalyzed enantioselective hydrogenation of substituted acrylic acids with sterically similar β,β-diaryls
Li, Yang,Dong, Kaiwu,Wang, Zheng,Ding, Kuiling
, p. 6748 - 6752 (2013/07/26)
Distinct differentiation: β,β-Disubstituted acrylic acids with sterically similar geminal diaryl groups can be hydrogenated with excellent enantioselectivities in the presence of a RhI complex formed in situ with two-component ligands, a chiral secondary phosphine oxide (SPO) and an achiral phosphine (Ph3P). The sense of asymmetric induction was found to be controlled by the substrate configuration, thus allowing access to both enantiomers of the product with the same catalyst. Copyright
N-ACRYLOYLPIPERAZINE DERIVATIVES, THEIR PREPARATION AND THEIR USE AS PAF ANTAGONISTS
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, (2008/06/13)
Compounds of formula (I): STR1 wherein R 1 and R 2 is each--R 5,--CH=CH--R 5 or--C C--R 5, wherein R. sup.5 is optionally substituted aryl or aromatic heterocyclic; R 3 is hydrogen, alkyl, cyano or--R 5 ; X is oxygen or sulfur; A is 1,4-piperazin-1, 4-diyl or a 1,4-homopiperazin-1,4-diyl; B' is alkylene, carbonyl, thiocarbonyl, sulfinyl or sulfonyl; and R 4 is optionally substituted phenyl and pharmaceutically acceptable salts thereof have valuable PAF antagonist activity, and may be prepared by reacting a compound containing the piperazine or homopiperazine part of the molecular with a compound containing the other part of the molecule.
