1-甲基-4-哌啶甲酸乙酯的合成路线有哪些？

基本信息：中文名称 1-甲基-4-哌啶甲酸乙酯中文别名 1-甲基哌啶-4-羧酸乙酯;1-甲基-4-哌啶甲酸乙;N-甲基-4-哌啶甲酸乙酯;1-甲基哌啶-4-甲酸乙酯;1-甲基哌啶-4-甲酸乙酯;1-甲基-哌啶-4-甲酸乙基酯;英文名称 ethyl 1-methylpiperidine-4-carboxylate英文别名 ethyl N-methyl-4-piperidine carboxylate;N-Methyl ethyl isonipecotate;ETHYL 1-METHYLPIPERIDINE-4-CARBOXYLATE;Ethyl 1-methyl Piperidine-4-carboxylate;1-Methyl-piperidine-4-carboxylic acid ethyl ester;1-methyl-4-piperidinecarboxylic acid ethyl ester;1-Methylpiperidine-4-carboxylic acid ethyl ester;1-methylpiperidine-4-carboxylic acid ethyl ester;ETHYL N-METHYLISONIPECOTATE;Ethyl N-methyl piperidine-4-carboxylate;Ethyl 1-methylpiperidin-4-carboxylate;ethyl 1-methyl-4-piperidinecarboxylate;4-ethoxycarbonyl-1-methylpiperidine;CAS号 24252-37-7合成路线：1.通过4-哌啶甲酸乙酯和甲醛合成1-甲基-4-哌啶甲酸乙酯，收率约99%；2.通过1-甲基哌啶-4-甲酸合成1-甲基-4-哌啶甲酸乙酯，收率约48%；更多路线和参考文献可参考http://baike.molbase.cn/cidian/2105