Rapid, General Access to Chiral β-Fluoroamines and β,β-Difluoroamines via Organocatalysis
摘要:
A rapid, general route to enantiopure beta-fluoroamines and beta,beta-difluoroamines has been developed employing organocatalysis in both a two-pot and a one-pot procedure. Both chemical yields (64-82%) and enantioselectivity (94-98% ee) were excellent and represent a significant improvement in the art of preparing chemically diverse beta-fluoroamines from readily available precursors.
Rapid, General Access to Chiral β-Fluoroamines and β,β-Difluoroamines via Organocatalysis
摘要:
A rapid, general route to enantiopure beta-fluoroamines and beta,beta-difluoroamines has been developed employing organocatalysis in both a two-pot and a one-pot procedure. Both chemical yields (64-82%) and enantioselectivity (94-98% ee) were excellent and represent a significant improvement in the art of preparing chemically diverse beta-fluoroamines from readily available precursors.
Rare earth-Li-BINOL complexes were used to catalyze nitroaldolreactions of α,α-difluoro adehydes with nitromethane in a good enantioselective manner. The optical yields of nitroaldol 2a depend on the size of rare earth metals, and an Sm-Li-BINOL complex gave the highest enantioselectivity. The enantiotopic face selection of α,α-difluoro aldehyde 1a was found to be different from that of nonfluorinated
[EN] PYRAZOLOPYRIDINE DERIVATIVES AND USES THEREOF<br/>[FR] DÉRIVÉS DE PYRAZOLOPYRIDINE ET LEURS UTILISATIONS
申请人:NOVARTIS AG
公开号:WO2022195454A1
公开(公告)日:2022-09-22
The present disclosure relates to compounds of formula (I) and pharmaceutical compositions and their use in reducing Widely Interspaced Zinc Finger Motifs (WIZ) expression levels, or inducing fetal hemoglobin (HbF) expression, and in the treatment of inherited blood disorders (e.g., hemoglobinopathies,e.g., beta-hemoglobinopathies), such as sickle cell disease and beta-thalassemia.