将对甲基苯甲酸与乙醇和浓硫酸反应,生成对甲基苯甲酸乙酯。随后,在醋酸钠存在下用吡啶与对甲基苯甲酸乙酯反应,可生成6-甲基吡啶-3-甲酸乙酯。
安全性在处理6-甲基吡啶-3-甲酸乙酯时,请注意以下事项:
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
6-甲基烟酸 | 6-methylnicotinic acid | 3222-47-7 | C7H7NO2 | 137.138 |
2,4-二氯-6-甲基吡啶-3-甲酸乙酯 | ethyl 2,4-dichloro-6-methylpyridine-3-carboxylate | 86129-63-7 | C9H9Cl2NO2 | 234.082 |
—— | ethyl 2,4-dihydroxy-6-methylnicotinate | 70254-53-4 | C9H11NO4 | 197.191 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
6-甲酰基烟酸乙酯 | 2-Formyl-pyridin-carbonsaeure-(5)-ethylester | 20857-31-2 | C9H9NO3 | 179.175 |
6-(溴甲基)吡啶-3-羧酸乙酯 | ethyl 6-(bromomethyl)nicotinate | 178264-57-8 | C9H10BrNO2 | 244.088 |
6-甲基烟酸 | 6-methylnicotinic acid | 3222-47-7 | C7H7NO2 | 137.138 |
—— | 6-Methyl-nicotinsaeure-ethylester-N-oxyd | 13720-81-5 | C9H11NO3 | 181.191 |
—— | 6-(2-methyl-benzyl)-nicotinic acid ethyl ester | 1256347-75-7 | C16H17NO2 | 255.316 |
5-甲酰基-2-甲基吡啶 | 2-methyl-5-formylpyridine | 53014-84-9 | C7H7NO | 121.139 |
6-甲基-3-羟甲基吡啶 | 6-methyl-3-pyridinemethanol | 34107-46-5 | C7H9NO | 123.155 |
The homogeneous catalytic hydrosilation-hydrogenation of pyridines is observed in the presence of Cp2TiMe2 (Cp = η5-C5H5) and CpCp*TiMe2 (Cp* = η5-C5Me5) as catalysts and using PhSiH3 or PhMeSiH2 as the source of Si-H. Under appropriate conditions, and with appropriate ring-substitution, good yields of the N-silyl-dihydropyridine or N-silyltetrahydropyridine products are be obtained. Although complete saturation is not achieved with organosilane alone, carrying out the reaction under moderate H2 pressures can give excellent yields of N-silylpiperidines. Under moderate pressures of H2, [Cp2TiH]2 catalyzes rapid H-D exchange between H2 and the 2- and 6-positions of C5D5N. Under the same conditions, only traces of hydrogenation are observed. This, together with the regioselectivity of 3-picoline hydrosilation-hydrogenation, leads to the conclusion that the key step in the reaction is probably addition of Ti-Si to C=N.Key words: hydrosilation, hydrogenation, pyridines, dimethyltitanocene, catalysis.