15022-08-9Relevant articles and documents
Highly efficient Tsuji-Trost allylation in water catalyzed by Pd-nanoparticles
Llevot,Monney,Sehlinger,Behrens,Meier
, p. 5175 - 5178 (2017)
Palladium nanoparticles stabilized by poly(vinylpyrrolidone) catalyze Tsuji-Trost allylations in water with very high turnover numbers. The di-allylation of methylene active compounds and the allylation of bio-based phenols was performed in high yield. The allylation of lignin showed a high selectivity towards the phenolic OH groups.
Nefedov et al.
, (1973)
Direct Synthesis of Diallyl Carbonate Via Urea Transesterification with Allyl Alcohol Over Metal Chlorides
Wang, Dengfeng,Zhang, Xuelan,Luo, Hainan,Wei, Shuwei,Zhao, Xueying
, p. 1067 - 1074 (2019)
A promising technique was studied towards diallyl carbonate (DAC) manufacture via urea transesterification with allyl alcohol over several metallic chlorides. It was revealed that the intermediate allyl carbamate (AC) was first generated via urea mono-alcoholysis with high yield, and subsequently AC further reacted with another allyl alcohol molecule to produce DAC. All the metal halides were evaluated for the overall reaction and the reaction of AC and allyl alcohol, respectively. This work found that the catalytic ability of catalysts originated from metal ions. Importantly, the highest yield of DAC could be achieved using LaCl3 as catalyst. In addition, the activation patterns of reactants were investigated using in situ FT-IR measurement. Based on the characterization results of X-ray power diffraction and elemental analysis of the lanthanum species, separated from the reaction conduced over LaCl3, a possible reaction mechanism was speculated. Graphical Abstract: [Figure not available: see fulltext.].
PROCESS FOR THE PREPARATION OF ORGANIC CARBONATE DERIVATES
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Page/Page column 22; 23; 24; 28, (2017/04/11)
The present invention relates in general terms to a new process for the preparation of organic carbonate derivatives, cyclic or linear by a trans carbonation reaction between PCC and a suitable aliphatic alcohol, in the presence of a homogeneous or heterogeneous basic catalyst; the process allows to optimize yields and selectivities of the obtained products, especially in the case of the preparation of symmetrical linear or cyclic carbonates starting from the corresponding primary alcohols.