Synthesis of saframycins. II. Preparations and reactions of N-methyl-2,5-piperazinediones.
作者:AKINORI KUBO、NAOKI SAITO、HIDEKAZU YAMATO、REIKO YAMAUCHI、KAZUMI HIRUMA、SATOSHI INOUE
DOI:10.1248/cpb.36.2607
日期:——
An efficient synthesis of 4-methyl-3-(2, 4, 5-trimethoxy-3-methylphenylmethyl)-2, 5-piperazinedione 5 and 1-methyl-3-(2, 4, 5-trimethoxy-3-methylphenylmethyl)-2, 5-piperazinedione 10 from (Z)-1-acetyl-3-(2, 4, 5-trimethoxy-3-methylphenylmethyl)-2, 5-piperazinedione 2 is described.The 1-methyl-2, 5-piperazinedione 10 is shown to be a useful intermediate for preparation of the 1, 5-imino-3-benzazocine derivative 16, which is the skeleton of the "right half" of saframycins.
4-甲基-3-(2,4,5-三甲氧基-3-甲基苯基甲基)-2,5-哌嗪二酮5和1-甲基-3-(2,4,5-三甲氧基-3-甲基苯基甲基)的高效合成描述了来自(Z)-1-乙酰基-3-(2, 4, 5-三甲氧基-3-甲基苯基甲基)-2, 5-哌嗪二酮 2 的 -2, 5-哌嗪二酮 10。 1-甲基-2, 5-哌嗪二酮 10 被证明是制备 1, 5-亚氨基-3-苯并佐辛衍生物 16 的有用中间体,16 是藏红霉素“右半部分”的骨架。