Copper(I)-Catalyzed Allylic Substitutions with a Hydride Nucleophile
作者:T. N. Thanh Nguyen、Niklas O. Thiel、Felix Pape、Johannes F. Teichert
DOI:10.1021/acs.orglett.6b00941
日期:2016.5.20
easily accessible copper(I)/N-heterocyclic carbene (NHC) complex enables a regioselective hydride transfer to allylic bromides, an allylic reduction. The resulting aryl- and alkyl-substituted branched α-olefins, which are valuable building blocks for synthesis, are obtained in good yields and regioselectivity. A commercially available silane, (TMSO)2Si(Me)H, is employed as hydride source. This protocol
Copper complexes generated in situ from CuCl2, alkylGrignardreagents, and 1,3‐dienes play important roles as catalytic active species for the 1,2‐hydroalkylation of 1,3‐dienes by alkylfluorides through CF bond cleavage. The alkyl group is introduced to an internal carbon atom of the 1,3‐diene regioselectively, thus giving rise to the branched terminal alkene product.
Convenient synthesis of diene–zirconocenes and regioselective partial reduction of the more highly substituted double bonds of conjugated dienes via complexation with zirconocenes and protonolysis
作者:John P. Maye、Ei-ichi Negishi
DOI:10.1039/c39930001830
日期:——
Conjugated dienes can be initially converted to their zirconocene complexes most conveniently by their reaction with (C5H5)2ZrCl2 and freshly ground Mg; the resultant complexes can then be protonolysed with 3 mol dmâ3 HCl to give regioselectively monoenes corresponding to partial hydrogenation of the more highly substituted double bond.
[EN] PROCESS FOR PRODUCING PHENYL-ALKANES USING OLEFIN ISOMERIZATION AND PARAFFIN RECYCLE<br/>[FR] PROCEDE POUR PRODUIRE DES PHENYLALCANES PAR ISOMERISATION D'OLEFINE ET REMISE EN CIRCULATION DE PARAFFINE
申请人:UOP LLC
公开号:WO2005068405A1
公开(公告)日:2005-07-28
A process for producing phenyl-alkanes by paraffin dehydrogenation followed by olefin isomerization and then by alkylation of a phenyl compound by a lightly branched olefin is disclosed. An effluent of the alkylation section comprises paraffins that are recycled to the dehydrogenation step. A process that sulfonates phenyl-alkanes having lightly branched aliphatic alkyl groups to produce modified alkylbenzene sulfonates is also disclosed. In addition, the compositions produced by these processes, which can comprise detergents, lubricants, and lubricant additives, are disclosed.