常温常压下稳定,应避免与氧化物接触。
3,5-二甲氧基苯甲酰胺可作为医药合成中间体。
制备3,5-二甲氧基苯甲酰胺可通过以下步骤制备:
在500 mL圆底烧瓶中加入3,5-二甲氧基苯甲酸(10.0 g,55 mmol),然后加入50 mL氯化亚砜溶解。加热至90℃回流2小时(TLC跟踪)。反应结束后,在60℃减压蒸干氯化亚砜,得到棕黄色油状物质12.11 g,无需纯化直接用于下一步。
在另一500 mL圆底烧瓶中加入50 mL氨水,并冰浴冷却20分钟。将步骤1的产物(11.0 g,55 mmol)溶于50 mL乙腈,缓慢滴加到三口烧瓶中。期间会产生大量白色固体。反应在室温下继续进行1.5小时(TLC跟踪)。反应结束后,转移至圆底烧瓶中,在50℃减压蒸干乙腈。用水洗涤所得的白色固体,抽滤并真空干燥得到3,5-二甲氧基苯甲酰胺137.8 g,产率为78.4%;1H NMR(400 MHz,CDCl₃):δ 7.03 (d, 2H),6.63 (t, 1H),3.80 (s, 6H)。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3,5-二甲氧基苯甲酰肼 | 3,5-dimethoxy-benzoic acid hydrazide | 51707-38-1 | C9H12N2O3 | 196.206 |
3,5-二甲氧基苯甲酰叠氮化物 | 3,5-dimethoxybenzoyl azide | 75996-26-8 | C9H9N3O3 | 207.189 |
3,5-二甲氧基苯甲酸 | 3,5-dimethoxybenzoic acid | 1132-21-4 | C9H10O4 | 182.176 |
3,5-二甲氧基苯甲酰氯 | 3,5-dimethoxybenzoyl chloride | 17213-57-9 | C9H9ClO3 | 200.622 |
3,5-二甲氧基苯甲酸甲酯 | methyl 3,5-dimethoxybenzoate | 2150-37-0 | C10H12O4 | 196.203 |
3,5-二乙氧基基苯甲酸甲酯 | ethyl 3,5-dimethoxybenzoate | 17275-82-0 | C11H14O4 | 210.23 |
3,5-二甲氧基苯腈 | 3,5-dimethoxy-benzonitrile | 19179-31-8 | C9H9NO2 | 163.176 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 3,5-dimethoxy-N-methylbenzamide | 74826-21-4 | C10H13NO3 | 195.218 |
—— | 3,5-dimethoxybenzoyl isocyanate | 1061639-77-7 | C10H9NO4 | 207.186 |
—— | 3,5-dimethoxy-N,N-dimethylbenzamide | 116114-87-5 | C11H15NO3 | 209.245 |
—— | N-benzyl-3,5-dimethoxybenzamide | —— | C16H17NO3 | 271.316 |
3,5-二甲氧基苄胺 | 3,5-dimethoxybenzylamine | 34967-24-3 | C9H13NO2 | 167.208 |
—— | N-acetyl-3,5-dimethoxybenzamide | 73823-21-9 | C11H13NO4 | 223.229 |
3,5-二甲氧基-N-苯基苯甲酰胺 | 3,5-dimethoxy-N-phenylbenzamide | 87282-04-0 | C15H15NO3 | 257.289 |
3,5-二甲氧基苯甲酸 | 3,5-dimethoxybenzoic acid | 1132-21-4 | C9H10O4 | 182.176 |
—— | N-cyclohexyl-3,5-dimethoxybenzamide | 349108-56-1 | C15H21NO3 | 263.337 |
—— | 3,5-dimethoxy-N-(4-methylphenyl)benzamide | 328969-54-6 | C16H17NO3 | 271.316 |
3,5-二甲氧基硫代苯甲酰胺 | 3,5-dimethoxybenzothioamide | 114980-23-3 | C9H11NO2S | 197.258 |
3,5-二甲氧基苯乙酮 | 1-(3,5-dimethoxyphenyl)ethan-1-one | 39151-19-4 | C10H12O3 | 180.203 |
—— | N-(4-bromophenyl)-3,5-dimethoxybenzamide | 328975-22-0 | C15H14BrNO3 | 336.185 |
—— | N-(4-chlorophenyl)-3,5-dimethoxybenzamide | 331828-14-9 | C15H14ClNO3 | 291.734 |
—— | 3,5-dimethoxy-N-(thiophen-2-ylmethyl)benzamide | —— | C14H15NO3S | 277.344 |
—— | 1-(3,5-dimethoxyphenyl)propan-1-one | 41497-31-8 | C11H14O3 | 194.23 |
—— | Dideuterio-(3,5-dimethoxyphenyl)methanamine | 1208988-65-1 | C9H13NO2 | 169.192 |
3,5-二甲氧基苄醇 | 3,5-dimethoxybenzyl alcohol | 705-76-0 | C9H12O3 | 168.192 |
—— | 1-(3,5-dimethoxyphenyl)-2-methylpropan-1-one | 73109-77-0 | C12H16O3 | 208.257 |
3,5-二甲氧基苯腈 | 3,5-dimethoxy-benzonitrile | 19179-31-8 | C9H9NO2 | 163.176 |
—— | 1-(3,5-dimethoxyphenyl)butan-1-one | 39911-73-4 | C12H16O3 | 208.257 |
1-(3,5-二甲氧基苯基)戊-1-酮 | 1-(3,5-dimethoxyphenyl)pentan-1-one | 5333-29-9 | C13H18O3 | 222.284 |
A simple and efficient approach for the synthesis of N,N′-methylenebisamides through a Selectfluor-mediated oxidative reaction of aromatic amides and N,N-dimethylpropanamide (DMP) is described. Remarkable results clearly reveal that DMP plays a dual role in this reaction, as both a one-carbon source and an environment-friendly solvent. Moreover, the process provides new strategies for the synthesis of bisamides with advantages of operationally simple, insensitive to atmospheric conditions, and good to high yields.