Efficient and Simple NaBH4 Reduction of Esters at Cationic Micellar Surface
摘要:
A simple, efficacious, and biocompatible methodology for reducing esters with sodium borohydride at an aqueous cationic micellar surface under ambient conditions has been developed. The present method holds promise for future use in selective functional group reduction and stereocontrolled alcohol synthesis.
Chiral cobalt-catalyzed enantioselective aerobic oxidation of α-hydroxy esters
作者:Santosh Kumar Alamsetti、Govindasamy Sekar
DOI:10.1039/c0cc01917h
日期:——
A chiral cobalt-catalyzed enantioselective aerobic oxidative kinetic resolution of (±)-α-hydroxy esters, using molecular oxygen as a sole oxidant, is reported and a maximum of selectivity factor (s) 31.9 was achieved with >99% enantiomeric excess for unreacted α-hydroxy esters.
A process for preparing an a-keto acid ester (oxo acid) of the formula:
wherein R1 is a hydrogen atom, aliphatic alkyl group of 1-6 carbon atoms, phenyl group or benzyl group, and R2 is an aliphatic alkyl group of 1-6 carbon atoms, which comprises causing an a-hydroxycarboxylic acid ester of the formula:
to react with molecular oxygen in a gaseous phase in the presence of copper phosphate, possibly, mounted on a solid carrier.
Efficient and Simple NaBH<sub>4</sub> Reduction of Esters at Cationic Micellar Surface
作者:Debapratim Das、Sangita Roy、Prasanta Kumar Das
DOI:10.1021/ol0481176
日期:2004.10.1
A simple, efficacious, and biocompatible methodology for reducing esters with sodium borohydride at an aqueous cationic micellar surface under ambient conditions has been developed. The present method holds promise for future use in selective functional group reduction and stereocontrolled alcohol synthesis.
Zirconocene-catalyzed direct (trans)esterification of acyl acids (esters) and alcohols in a strict 1 : 1 ratio under solvent-free conditions
作者:Zhi Tang、Qiutao Jiang、Lifen Peng、Xinhua Xu、Jie Li、Renhua Qiu、Chak-Tong Au
DOI:10.1039/c7gc02174g
日期:——
A highlyefficient way for direct (trans)esterification of acyl acids(esters) and alcohols in a strictly 1:1 ratio using zirconocene complex (1, 1 mol%), a strong Lewis acid of good water tolerance, as catalystundersolvent-free condition has been developed. A wide range of acids and alcohols(esters) substrates undergo (trans)esterification to produce carboxylic ester motifs in moderate to good or