Comparison of Bimacrocyclic, Monomacrocyclic, and Nonmacrocyclic Bis(amidomethyl)pyridines as Catalysts in the Base-Catalyzed Addition of Alcohols to Ketenes
作者:Sönke Petersen、Ulrich Lüning
DOI:10.1002/(sici)1099-0690(199904)1999:4<847::aid-ejoc847>3.0.co;2-3
日期:1999.4
Nineteen new bimacrocyclic, monomacrocyclic, and nonmacrocyclic pyridines 1–6 bearing amide functions have been synthesized and utilized in base-catalyzed additions of alcohols (ethanol, 2-propanol) and polyols [propane-1,2-diol (11a), butane-1,3-diol (12a), methyl 4,6-O-benzylidene-α-D-glucopyranoside (13a)] to diphenylketene. Compounds 4c, 4d and 1b proved to be efficient and selective catalysts;
十九新bimacrocyclic,monomacrocyclic和nonmacrocyclic吡啶1 - 6轴承酰胺功能已被合成并在醇(乙醇,2-丙醇)和多元醇[丙烷-1,2-二醇(碱催化添加物使用的图11A),丁烷1,3-二醇(12a),甲基4,6 - O-亚苄基-α-D-吡喃葡萄糖苷(13a)]形成二苯乙烯酮。化合物4c,4d和1b被证明是有效的选择性催化剂。4c和4d在11a和12a以及1b下表现出更好的结果是13a选择性2- O-酰化的最佳催化剂。