基本解释:2,4-双甲氧基-苯甲醛
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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。9QP汉语字典
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(yào)甲氧苄啶、三甲氧基肉桂酰胺、鬼臼(dú)素等多种(yào)物的合成 。9QP汉语字典
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 。9QP汉语字典
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%。9QP汉语字典
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9QP汉语字典
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9QP汉语字典
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9QP汉语字典
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9QP汉语字典
3,4-methylene dioxybenzaldehyde3,4-亚甲二氧基苯甲醛9QP汉语字典
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9QP汉语字典
THE SYNTHESIS OF 4-HYDROXY-3-METHOXY BENZALDEHYDE XYLOSIDASE4-羟基-3-甲氧基苯甲醛木糖苷的合成9QP汉语字典
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9QP汉语字典
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9QP汉语字典
Study on Synthesis of 2,4,6-trimethylbenzaldehyde;2,4,6-三甲基苯甲醛合成与工艺研究9QP汉语字典
Preparation Method of 2,4,6-Trimethylbenzaldehyde2,4,6-三甲基苯甲醛的制备方法9QP汉语字典
Oxidation of p-nitrobenzaldehyde to p-nitrobenzoic acid with hydrogen peroxideH_2O_2氧化对硝基苯甲醛制备对硝基苯甲酸9QP汉语字典
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9QP汉语字典
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9QP汉语字典
Mn_2O_3 Oxide Synthesis of P-hydroxybenzaldehydeMn_2O_3氧化合成对羟基苯甲醛9QP汉语字典
methyl p-methoxybenzoate对甲氧基苯甲酸甲酯9QP汉语字典
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9QP汉语字典
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9QP汉语字典
