in toluene addn. of slight molar excess of B(C2H5)3 to carboxylic acid (liq. or dissolved in toluene) placed in a cooled vessel (-80°C); warming slowly to 50-80°C;; removing volatiles under reduced pressure; purification by vac. distn. or crystn. from a non-polar solvent;;
参考文献
Yalpani, Mohamed; Boese, Roland; Seevogel, Klaus; Koester, Roland
Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999), 1993 , # 1 p. 47 - 50