New Platinum-Catalysed Dihydroalkoxylation of Allenes
作者:María Paz Muñoz、María C. de la Torre、Miguel A. Sierra
DOI:10.1002/adsc.201000342
日期:2010.9.10
A new platinum‐catalysed dihydroalkoxylation of allenes is described to give aliphatic acetals by an unexpected attack of two molecules of methanol to the terminal carbon of the allene moiety. Deuteration experiments suggest an unprecedented formal 1,3‐dipolar addition of methanol to a zwitterionic platinum carbene as the key step. The first platinum‐catalysed intermolecular carbon‐based nucleophile
Zeolite based catalytic process for preparation of acylated aromatic ethers
申请人:Jasra Vir Raksh
公开号:US20060041171A1
公开(公告)日:2006-02-23
The present invention relates to an improved zeolite based catalytic process for the preparation of acylated aromatic ethers and more particularly, the invention relates to catalysed acylation of anisole (methoxybenzene) and veratrole (1,2-dimethoxybenzene) for the preparation of acylated aromatic ether, namely, p-methoxyacetophenone and 3,4-dimethoxyacetophenone respectively using microporous alumino-silicates solids like zeolites.
[EN] ZEOLITE BASED CATALYTIC PROCESS FOR PREPARATION OF ACYLATED AROMATIC ETHERS<br/>[FR] PROCÉDÉ CATALYTIQUE À BASE DE ZÉOLITE POUR LA PRÉPARATION D'ÉTHERS AROMATIQUES ACYLÉS
申请人:COUNCIL SCIENT IND RES
公开号:WO2006016197A1
公开(公告)日:2006-02-16
The present invention relates to an improved zeolite based catalytic process for the preparation of acylated aromatic ethers and more particularly, the invention relates to catalysed acylation of anisole (methoxybenzene) and veratrole (1,2- dimethoxybenzene) for the preparation of acylated aromatic ether, namely, p-methoxyacetophenone and 3,4-dimethoxyacetophenone respectively using microporous alumino-silicates solids like zeolites.
Solvent directed electrophilic iodination and phenylselenenylation of activated alkyl aryl ketones
作者:Barbara Panunzi、Lucia Rotiroti、Marco Tingoli
DOI:10.1016/j.tetlet.2003.10.037
日期:2003.12
A mixture of molecular iodine and phenyliodine(III) bis(trifluoroacetate) (BTI) in CH3CN (or CH3OH) iodinates the aromatic ring of some activated alkyl aryl ketones. A different outcome results if PhSeSePh is used instead of I2 in the presence of BTI. In CH3CN the aromatic phenylselenenylation is still observed while in CH3OH the formation of α-phenylseleno ketones occurs followed by the conversion
Reactivity of n-aryl-α, α-dichlorinated arylketimines
作者:Norbert De Kimpe、Roland Verhé、Laurent De Buyck、Sunari Tukiman、Niceas Schamp
DOI:10.1016/0040-4020(79)80096-4
日期:1979.1
α-dichloroalkylarylketimines are formed from N-aryl-alkylarylketimines with N-chloro succinimide in carbon tetrachloride. Reaction of N-1-(2,2-dichlor-1-arylpropylidene)anilines with sodiummethoxide the latter compounds formally involves migration of the notrogen atom from the 1- to the 3-position. The reaction of higher substituted N-aryl-α,α-dichloroalkylarylketimines with sodiummethoxide leads mainly to α-chloro-α