77100-93-7Relevant articles and documents
Synthesis of Hf(IV) complex from cyclam (1,4,8,11-tetraazacyclotetradecane) -containing amino-amido groups
Thirumavalavan, Munusamy,Lee, Jiunn-Fwu
, p. 223 - 226 (2012)
The reactivity of cyclam (1,4,8,11-tetraazacyclcotetradecane)-containing amino-amido groups with hafnium(IV) chloride was described. Taylor & Francis Group, LLC.
Electrochemical Tandem Olefination and Hydrogenation Reaction with Ammonia
Zhang, Xiaofeng,Jiang, Runze,Cheng, Xu
, p. 16016 - 16025 (2021/08/24)
An electrochemical Horner-Wadsworth-Emmons/hydrogenation tandem reaction was achieved using ammonia as electron and proton donors. The reaction could give two-carbon-elongated ester and nitrile from aldehyde or ketones directly. This reaction could proceed with a catalytic amount of base or even without a base. The ammonia provides both the electron and proton for this tandem reaction and enables the catalyst-free hydrogenation of an α,β-unsaturated HWE intermediate. More than 40 examples were reported, and functional groups, including heterocycles and hydroxyl, were tolerated.
ZWITTERIONIC CATALYSTS FOR (TRANS)ESTERIFICATION: APPLICATION IN FLUOROINDOLE-DERIVATIVES AND BIODIESEL SYNTHESIS
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Paragraph 0019; 0031, (2021/01/29)
An amide/iminium zwitterion catalyst has a catalyst pocket size that promotes transesterification and dehydrative esterification. The amide/iminium zwitterions are easily prepared by reacting aziridines with aminopyridines. The reaction can be applied a wide variety of esterification processes including the large-scale synthesis of biodiesel. The amide/iminium zwitterions allow the avoidance of strongly basic or acidic condition and avoidance of metal contamination in the products. Reactions are carried out at ambient or only modestly elevated temperatures. The amide/iminium zwitterion catalyst is easily recycled and reactions proceed in high to quantitative yields.
