4-Amino-5-chloro-2-ethoxybenzoic acid, the important intermediate of mosapride, was synthesized from sodium p-aminosalicylate by esterification, amidation, o-ethylation by diethyl sulphat, and then hydrolysis with an overall yield of 47.
以硫酸二乙酯为o-乙基化试剂,可提高收率,缩短反应时间,总收率47。
Amino-5-chloro-2-ethoxybenzoic acid, the important intermediate of mosapride, was synthesized from sodium p-aminosalicylate by esterification, amidation, O-ethylation by EtBr, and then hydrolysis with an overall yield of 57.
以溴乙烷为 O-乙基化试剂 ,并预先加入催化量的碘化钾 ,可提高收率 ,缩短反应时间。
triethyl phosphate catalyst
三乙基磷酸酯催化剂
Phosphatotungstic Acids Catalysts Supported on Alumina
磷钨酸-拟薄水铝石负载催化剂合成对羟基苯甲酸乙酯
Acetalization of ethyl acetoacetate with ethylene glycol using heteropolyacid H_3PW_(12)O_(40) supported on active carbon as catalyst
乙酰乙酸乙酯与乙二醇在活性炭负载磷钨酸催化剂上缩合反应
In this paper tungstosilicic triethanolamine salt and tungstophoric triethanolamine salt were prepared and used as catalysts in the synthesis of n-butyl lactate, The synthetic conditions with tungstosilicic triethanolamine salt as catalyst were also examined.
合成了硅钨三乙醇胺盐和磷钨酸三乙醇胺盐,并以它们为催化剂,合成了乳酸正丁酯。
Study on Direct Synthesis of Ethyl Acetate from Ethanol over Mo-Based Catalyst;
钼基催化剂乙醇一步法制备乙酸乙酯的研究
Study on synthesis of ethyl acetate with tungstophosphoric acid as catalysts;
磷钨杂多酸催化合成乙酸乙酯的研究
Study on Catalysts for Ethyl Acetate Catalytic Combustion Purification;
乙酸乙酯催化燃烧净化催化剂的研究
Composing 1-phyomone methylester with Modified Catalyzer;
改性催化剂催化合成1——萘乙酸甲酯
Advances in synthesis of diethyl malonate catalyst by carbonylation
羰基化法合成丙二酸二乙酯催化剂的研究进展
Studies on the Amorphous Ru-base Catalysts and Their Applications in the Hydrogenation of Ethyl Lactate;
非晶态Ru基催化剂及其乳酸乙酯加氢反应研究
Research Progress in Catalysts for Synthesizing P-Hydroxyl Ethyl Benzoate;
对羟基苯甲酸乙酯合成催化剂的研究进展
Reactive Distillation Process of Ethyl Acetate Synthesis Catalysed by 12-molybdophosphoric Acid;
磷钼酸催化精馏合成乙酸乙酯工艺研究
The synthesis of ethyl acetate with compound tungstophosphoric acid as catalysts;
复配型钨磷酸催化合成乙酸乙酯的研究
The Heterogenerogs Catelytic Synthesis of Ethyl Phnylacetate by Supported Heteropolyacid Catalyst PW12/C;
活性炭固载磷钨杂多酸催化合成苯乙酸乙酯
Regioselective Synthesis of 2-O-Vinyl Adipoyl Sucrose Ester Catalyzed by Immobilized Phosphates
固定化磷酸盐选择性催化合成2-O-己二酸单乙烯基蔗糖酯
The Preparation of Cobalt Carbonys Catalyst and Its Catalyzed Carbonylation for Synthesis of Diethyl Malonates
羰基钴催化剂的制备及其催化羰基化合成丙二酸二乙酯
Catalytic Synthesis of Ethylene Glycol Diacetate by Environmental Friendly Catalysts;
环境友好催化剂催化合成乙二醇二乙酸酯
Synthesis of ethye acetate catalysed by LaZSM-5 zeolite;
La系分子筛催化剂催化合成乙酸乙酯的研究