7473-00-9Relevant academic research and scientific papers
Pd-catalyzed hydroaminocarbonylation of alkynes with aliphatic amines and its mechanism study
Wang, Dong-Liang,Guo, Wen-Di,Liu, Lei,Zhou, Qing,Liang, Wen-Yu,Lu, Yong,Liu, Ye
, p. 1334 - 1337 (2019/03/26)
This work describes the hydroaminocarbonylation of alkynes with aliphatic amines without the addition of any acid additive. Excellent conversion and regioselectivity toward the formation of branched amides were obtained over a dppp-based Pd-catalytic syst
Palladium(II)-catalyzed catalytic aminocarbonylation and alkoxycarbonylation of terminal alkynes: Regioselectivity controlled by the nucleophiles
Suleiman, Rami,Tijani, Jimoh,El Ali, Bassam
experimental part, p. 38 - 46 (2010/10/02)
The aminocarbonylation and alkoxycarbonylation reactions of terminal alkynes took place smoothly and efficiently using a catalyst system Pd(OAc) 2-dppb-p-TsOH-CH3CN-CO under relatively mild experimental conditions. The catalytic system was tested and optimized using two different nucleophiles: alcohols and amines. Phenylacetylene (1a) was considered as an alkyne along with diisobutylamine (2b1) andmethanol (2c1) as nucleophiles. The results showed significant differences in the conversion of 1a and in the selectivity towards the gem or trans unsaturated esters or amides with these nucleophiles. The effects of the type of palladium catalysts, the type of ligands, the amount of dppb and the solvents were carefully studied. With diisobutylamine (2b1), excellent regioselectivity towards the 2-acrylamides (gem isomer, 3ab1) was almost always observed, while trans-α,β-unsaturated esters 4ac1 was the predominant product with methanol (2c1) as a nucleophile. This remarkable sensitivity in the selectivity of the reaction indicates two different possible mechanistic pathways for these carbonylation reactions. Copyright
Stabilization of Organic Materials
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, (2008/12/04)
The invention describes a process for stabilizing an organic material against oxidative, thermal or light-induced degradation, which comprises incorporating therein or applying thereto at least a compound of the formula (I) wherein the general symbols are
