2-Pyridyl-2-phospholenes: New P,N ligands for the palladium-catalyzed isoprene telomerization
作者:F LECA、R REAU
DOI:10.1016/j.jcat.2006.01.010
日期:2006.3.10
ligands for the palladium-catalyzed telomerization of isoprene with diethylamine. Good selectivities for the tail-to-head or tail-to-tail aminoterpenes are achieved on optimization of the ligand substituents and of the reaction conditions, such as the nature of the catalyst precursor and of the solvent. Moreover, excellent catalytic activities are achieved on photochemical activation or addition of acidic
Process for producing optically active 3, 7-dimethyl-6-octenol and process for producing intermediate therefor
申请人:——
公开号:US20020004620A1
公开(公告)日:2002-01-10
Provided is citronellol, which has an elegant rosy fragrance and is extremely useful for fragrance impartation to aromatic articles. A mixture of an alkylamine and isoprene in a molar ratio of from 1:4 to 1:4.5 is subjected to telomerization at 80 to 100° C. for 2.5 to 3.5 hours in the presence of an alkyllithium catalyst and/or phenyllithium catalyst to obtain a nerylamine compound containing 2 to 10 wt % &agr;-nerylamine compound represented by general formula (4).
1
From this nerylamine compound, citronellol containing 2 to 10 wt % optically active 3,7-dimethyl-7-octenol is produced through the reaction steps of asymmetric isomerization, hydrolysis, and hydrogenation.
Process for producing optically active 3,7-dimethyl-6-octenol and process for producing intermediate therefor
申请人:TAKASAGO INTERNATIONAL CORPORATION
公开号:US20020128525A1
公开(公告)日:2002-09-12
Provided is citronellol, which has an elegant rosy fragrance and is extremely useful for fragrance impartation to aromatic articles A mixture of an alkylamine and isoprene in a molar ratio of from 1:4 to 1:4.5 is subjected to telomerization at 80 to 100° C. for 2.5 to 3.5 hours in the presence of an alkyllithium catalyst and/or phenyllithium catalyst to obtain a nerylamine compound containing 2 to 10 wt % &agr;-nerylamine compound represented by general formula (4).
1
From this nerylamine compound, citronellol containing 2 to 10 wt % optically active 3,7-dimethyl-7-octenol is produced through the reaction steps of asymmetric isomerization, hydrolysis, and hydrogenation.