Selective conversion of C=N bonds to their corresponding carbonyl compounds by the tribromoisocyanuric acid/wet SiO2 system as a novel reagent
作者:Davood Habibi、Mohammad Ali Zolfigol、Ali Reza Faraji、Payam Rahmani
DOI:10.1007/s00706-011-0649-5
日期:2012.5
Tribromoisocyanuric acid/wet SiO2 was used for the conversion of C=N bonds to their corresponding carbonyl compounds in oximes, semicarbazones, azines, and Schiff bases. The interesting feature of this system is that in those oximes, semicarbazones, azines, and Schiff bases which have conjugated or unconjugated C=C bonds, the C=N bond will selectively change to the relevant C=O bond while the conjugated or unconjugated C=C bond will remain intact.
Method for preparing an unsaturated carboxylic acid
申请人:Jacquot Roland
公开号:US20060100459A1
公开(公告)日:2006-05-11
The invention concerns a method for preparing an unsaturated carboxylic acid from the corresponding aldehyde. More particularly, the invention aims at preparing an aliphatic carboxylic acid having at least an unsaturation conjugated with the carbonyl group. In particular, the invention concerns the preparation of geranic acid. The invention relates to a method for preparing an unsaturated carboxylic acid from the corresponding aldehyde. Said method is characterized in that it comprises a step which consists in oxidizing said aldehyde, in controlled basic medium and using molecular oxygen or a gas containing same, in the presence of a catalyst based on palladium and/or platinum and an activator based on bismuth, in conditions such that the oxidizing is carried out by diffusion process