Chemistry of Amino Acids. VII. The Synthesis and Spectral Studies of Some 2-Piperidones bearing β-Keto Ester Groups
作者:TAKAYUKI SHIOIRI、TOSHIRO TAKUSAGAWA、SHUNICHI YAMADA
DOI:10.1248/cpb.17.467
日期:——
Some 2-piperidones (IX and X) bearing β-keto ester groups were synthesized from the methyl esters (V) of alanine and phenylalanine according to a route similar to that described in our previous paper. Spectral studies (infrared, ultraviolet and nuclear magnetic resonance) revealed that these β-keto esters (IX and X) mainly exist in the chelated enolic tautomer (E) both in the solid state and in solution. The NMR spectra of some indole derivatives (XI-XVI) were also investigated.
根据类似于我们之前论文中所述的路线,从丙氨酸和苯丙氨酸的甲酯(V)合成了一些带有 β-酮基的 2-哌啶酮(IX 和 X)。光谱研究(红外线、紫外线和核磁共振)显示,这些 β-酮酯类(IX 和 X)在固态和溶液中主要以螯合烯醇同系物(E)的形式存在。此外,还研究了一些吲哚衍生物(XI-XVI)的核磁共振光谱。