lewis acid catalyst造句

• Acetylation between alcohol and benzoyl oxide was carried out using znbr2 as a lewis acid catalyst in solvent - free condition . some structures were characterized by nmr and ir
  以溴化锌为催化剂，在无溶剂条件下实现了醇与苯甲酸酐的酰化反应，部分产物经nmr和ir表征。
• Acetylation between alcohol and benzoyl oxide was carried out using znbr2 as a lewis acid catalyst in solvent - free condition . some structures were characterized by nmr and ir
  摘要以溴化锌为催化剂，在无溶剂条件下实现了醇与苯甲酸酐的酰化反应，部分产物经nmr和ir表征。
• They were used as efficient lewis acid catalysts for esterification reactions of carboxylic acids with alcohols to afford corresponding saturated esters with 87 % ~ 98 % yields and unsaturated and tertiary ones with 90 % ~ 94 % and 54 % ~ 68 % yields , respectively
  结果表明，该有机锡化合物是合成酯的优良催化剂，产品收率高，饱和一元羧酸酯的收率为87 % ~ 98 % ，对不饱和羧酸酯和空间位阻大的叔醇酯也能得到较满意的收率，分别为90 % ~ 94 %和54 % ~ 68 % 。