Water-Tolerant and Reusable Catalysts for Direct Ester Condensation between Equimolar Amounts of Carboxylic Acids and Alcohols
作者:Masaya Nakayama、Atsushi Sato、Kazuaki Ishihara、Hisashi Yamamoto
DOI:10.1002/adsc.200404149
日期:2004.9
ZrOCl2⋅8 H2O and HfOCl2⋅8 H2O are highly effective, water-tolerant, and reusable homogeneous catalysts for direct ester condensation between equimolar amounts of carboxylic acids and alcohols. Notably, zirconium(IV) salts such as ZrOCl2⋅8 H2O and Zr(OAc)x(OH)y are potential green catalysts due to their low toxicity, commercial availability at low cost, ease of handling, high catalytic activity, and
的ZrOCl 2 ⋅8ħ 2 O和HfOCl 2 ⋅8ħ 2的O高效,耐水,并为等摩尔量的羧酸和醇之间的直接酯缩合可重复使用的均相催化剂。值得注意的是,锆(IV)盐,例如的ZrOCl 2 ⋅8ħ 2 O和Zr的(OAC)X(OH)ý是潜在的绿色的催化剂,由于其毒性低,商业可获得低成本,易于操作,高的催化活性,和可重用性。