[EN] A PROCESS FOR PREPARATION OF E-ISOMER OF 1-(4-METHYLPHENYL)- 1-(2-PYRID YL)-3-PYRROLIDINO PROP-1-ENE AND ACID ADDITION SALTS THEREOF [FR] PROCÉDÉ DE PRÉPARATION DE L'ISOMÈRE E DU 1-(4-MÉTHYLPHÉNYL)-1-(2-PYRIDYL)-3-PYRROLIDINO-PROP-1-ÈNE ET DE SES SELS D'ADDITION D'ACIDE
[EN] A PROCESS FOR PREPARATION OF E-ISOMER OF 1-(4-METHYLPHENYL)- 1-(2-PYRID YL)-3-PYRROLIDINO PROP-1-ENE AND ACID ADDITION SALTS THEREOF [FR] PROCÉDÉ DE PRÉPARATION DE L'ISOMÈRE E DU 1-(4-MÉTHYLPHÉNYL)-1-(2-PYRIDYL)-3-PYRROLIDINO-PROP-1-ÈNE ET DE SES SELS D'ADDITION D'ACIDE
Chemoselective palladium-catalyzed deprotonative arylation/[1,2]-Wittig rearrangement of pyridylmethyl ethers
作者:Feng Gao、Byeong-Seon Kim、Patrick J. Walsh
DOI:10.1039/c5sc02739j
日期:——
and reaction temperature play a pivotal role in tuning the reactivity of intermediates and controlling the relative rates of competing processes. The novel arylation step is catalyzed by a Pd(OAc)2/NIXANTPHOS-based system via a deprotonativecross-couplingprocess. The method provides rapid access to skeletally diverse aryl(pyridyl)methanol core structures, which are central components of several medications
PROCESS FOR PREPARATION OF E-ISOMER OF 1-(4-METHYLPHENYL) - 1-(2-PYRID YL)-3-PYRROLIDINO PROP-1-ENE AND ACID ADDITION SALTS THEREOF
申请人:Gupta Rajender Pershad
公开号:US20110046384A1
公开(公告)日:2011-02-24
A process for preparation of E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula-I, and acid addition salts thereof, said process comprising; dehydrating 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinopropan-1-ol of Formula III followed by adding a base solution to obtain a mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene, and washing said mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene with water to dissolve Z isomer and to obtain E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula I, which is substantially free from Z isomer.
Process for preparation of E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidino prop-1-ene and acid addition salts thereof
申请人:Hikal Limited
公开号:US08350045B2
公开(公告)日:2013-01-08
A process for preparation of E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula-I, and acid addition salts thereof, said process comprising; dehydrating 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinopropan-1-ol of Formula III followed by adding a base solution to obtain a mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene, and washing said mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene with water to dissolve Z isomer and to obtain E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula I, which is substantially free from Z isomer.