The content ratio of the two isomers in the products of condensation reaction with trimethoxybenzaldehyde as raw material is the key factor to improve the productivity of trimethoprim(TMP).
研究了合成甲氧苄胺嘧啶的前一步缩合反应产物α (3,4,5 三甲氧基苄基 ) β 甲氧基丙腈的两种同分异构体及反应物三甲氧基苯甲醛 (TMB)的定量分析方法 ,其中色谱柱为Nova PakC18柱 (4 μm ,3 9mmi d × 15 0mm) ,流动相组成为四氢呋喃 水 (体积比为 30∶70 ) ,流速为 1 0mL/min ,检测波长为 32 0nm。
0 5 MPa) to provide sodium phenolate of 3,5-dimethoxy-4-hydroxybenzaldehyde, from which 3,4,5-trimethoxybenzaldehyde was obtained by methylation directly with dimethyl sulfate in aqueous sodium hydro.
3,4,5-三甲氧基苯甲醛是重要的有机合成中间体 ,广泛应用于医药甲氧苄啶、三甲氧基肉桂酰胺、鬼臼毒素等多种药物的合成 。
The cell structure of p methoxybenzaldehyde by the indirect electrosynthesis using ceric/cerous as electrolytic medium was studied.
研究了Ce4 + /Ce3+ 做氧化媒质间接电合成对甲氧基苯甲醛的槽型结构 。
Under the catalytic amount of concentrated hydrochloric acid,the Mannich reaction of p methoxyacetophenone,benzaldehyde or p methoxybenzaldehyde and arylamines can be carried out directly at 0～35℃.
对甲氧基苯乙酮与苯甲醛或对甲氧基苯甲醛和芳香胺在0～35℃和催化量浓盐酸存在下可直接发生Mannich反应,生成了相应的Mannich碱(Ⅰ)———1,3二芳基3芳氨基丙酮,共合成16个新的有机化合物,产率为50%～90%。
The Study on the Study on the Purification of Trimethoxy Benzaldehyde (TMB);
三甲氧基苯甲醛(TMB)的精制方法
REDUCTION PROCESS OF 3,4,5-TRIMETHOXYBENZALDEHYDE OVER Pd/C CATALYST
钯/碳催化的3,4,5-三甲氧基苯甲醛还原反应
The Study on Dehydration in Synthesizing Trimethoprim(TMP)from Trimethoxy Benzaldehyde;
以三甲氧基苯甲醛为原料合成甲氧苄胺嘧啶(TMP)的脱水工艺研究
Study on Solution Heat Determination in Synthesizing Trimethoprim(TMP) from 3,4,5-Trimethoxybenzaldehyde;
以三甲氧基苯甲醛为原料合成甲氧苄氨嘧啶(TMP)工艺中溶解热的测定
3,4-methylene dioxybenzaldehyde
３,４－亚甲二氧基苯甲醛
Studies on Hydrogenation of M-phenoxybenzoic Acid to Corresponding Aldehyde;
间苯氧基苯甲酸催化加氢合成间苯氧基苯甲醛
THE SYNTHESIS OF 4-HYDROXY-3-METHOXY BENZALDEHYDE XYLOSIDASE
4-羟基-3-甲氧基苯甲醛木糖苷的合成
Preparation of o-NBA via Liquid Phase Oxidation of o-MNT with Oxygen
氧气液相氧化邻硝基甲苯制取邻硝基苯甲醛
Preparation of Benzoic Acid and Benzaldehyde by the Oxidation Of Toluene in the Liquid Phase
甲苯液相氧化法制取苯甲酸和苯甲醛
Study on Synthesis of 2,4,6-trimethylbenzaldehyde;
2，4，6-三甲基苯甲醛合成与工艺研究
Preparation Method of 2,4,6-Trimethylbenzaldehyde
2,4,6-三甲基苯甲醛的制备方法
Oxidation of p-nitrobenzaldehyde to p-nitrobenzoic acid with hydrogen peroxide
H_2O_2氧化对硝基苯甲醛制备对硝基苯甲酸
One-pot Synthesis of Methyl 3,4,5-Trimethoxybenzoate
一步合成3,4,5-三甲氧基苯甲酸甲酯
Study on Preparation of Anisaldehyde and Solid Glyoxylic Acid by Ozonolysis Process;
臭氧氧化法制备对甲氧基苯甲醛和晶体型乙醛酸的工艺研究
Mn_2O_3 Oxide Synthesis of P-hydroxybenzaldehyde
Mn_2O_3氧化合成对羟基苯甲醛
methyl p-methoxybenzoate
对甲氧基苯甲酸甲酯
Progress in P-cresol Catalytic oxidation synthetic of P-hydroxybenzaldehyde
对甲酚催化氧化合成对羟基苯甲醛研究进展
Research about the Synthesis of Veratraldehyde and 3,4-Dimethoxy-Benzeneacetaldehyde;
藜芦醛和3,4-二甲氧基苯乙醛的合成研究