Synthesis and enantiomeric recognition studies of a novel 5,5-dioxophenothiazine-1,9 bis(thiourea) containing glucopyranosyl groups
摘要:
A novel optically active 5,5-dioxophenothiazine-1,9 bis(thiourea) containing glucopyranosyl groups was synthesized and its enantiomeric recognition properties were examined towards the enantiomers of tetrabutylammonium salts of chiral alpha-hydroxy and N-protected alpha-amino acids using UV-vis spectroscopy. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and enantiomeric recognition studies of a novel 5,5-dioxophenothiazine-1,9 bis(thiourea) containing glucopyranosyl groups
摘要:
A novel optically active 5,5-dioxophenothiazine-1,9 bis(thiourea) containing glucopyranosyl groups was synthesized and its enantiomeric recognition properties were examined towards the enantiomers of tetrabutylammonium salts of chiral alpha-hydroxy and N-protected alpha-amino acids using UV-vis spectroscopy. (C) 2012 Elsevier Ltd. All rights reserved.
Enantioselective C−H Olefination of α-Hydroxy and α-Amino Phenylacetic Acids by Kinetic Resolution
作者:Kai-Jiong Xiao、Ling Chu、Jin-Quan Yu
DOI:10.1002/anie.201510808
日期:2016.2.18
development of enantioselective C−H activation reactions by desymmetrization. However, the requirement for the presence of two chemically identical prochiral C−H bonds represents an inherent limitation in scope. Reported is the first example of kinetic resolution by a palladium(II)‐catalyzed enantioselective C−H activation and C−C bond formation, thus significantly expanding the scope of enantioselective C−H
The invention relates to compounds of formula I
wherein R
1
, R
2
, R
4
, R
a
, R
b
, R
c
, R
e
, A*, W
1
, W
2
and W
3
are as defined in claim
16
, for the treatment of CXCR3 related diseases.