Determination of the absolute configuration of two α v β 6 integrin inhibitors for the treatment of idiopathic pulmonary fibrosis and investigations on the asymmetric 1,4-addition of arylboronic acids to crotonate esters bearing a C4-oxygen substituent
摘要:
The absolute configuration of two novel alpha(v)beta(6) integrin inhibitors was established via degradation to the corresponding C3-aryl substituted butyrolactone. The configuration of the resulting lactones was established by asymmetric synthesis using 1,4-addition of arylboronic acids to butenolide, catalysed by bis (norbornadiene)rhodium (I) tetrafluoroborate in the presence of (R)-BINAP, and confirmed by X-ray crystallography. Studies on arylboronic acid conjugate additions to acyclic crotonate esters bearing a gamma-oxygen substituent are also reported. Three Rh catalysts were investigated and the one giving the highest enantioselectivity was bis(norbornadiene)rhodium (I) tetrafluoroborate. (C) 2017 Elsevier Ltd. All rights reserved.
Determination of the absolute configuration of two α v β 6 integrin inhibitors for the treatment of idiopathic pulmonary fibrosis and investigations on the asymmetric 1,4-addition of arylboronic acids to crotonate esters bearing a C4-oxygen substituent
摘要:
The absolute configuration of two novel alpha(v)beta(6) integrin inhibitors was established via degradation to the corresponding C3-aryl substituted butyrolactone. The configuration of the resulting lactones was established by asymmetric synthesis using 1,4-addition of arylboronic acids to butenolide, catalysed by bis (norbornadiene)rhodium (I) tetrafluoroborate in the presence of (R)-BINAP, and confirmed by X-ray crystallography. Studies on arylboronic acid conjugate additions to acyclic crotonate esters bearing a gamma-oxygen substituent are also reported. Three Rh catalysts were investigated and the one giving the highest enantioselectivity was bis(norbornadiene)rhodium (I) tetrafluoroborate. (C) 2017 Elsevier Ltd. All rights reserved.
The present invention relates to new compositions comprising acamprosate and baclofen, or a salt, enantiomer, racemate, a derivative, prodrug or metabolite thereof, and methods for protecting neuronal cells from ischemic or hypoxic events. More precisely, this invention provides new combinatorial therapies that efficiently protect neuronal cells from ischemia or hypoxia.