Regioselective N-Acylation of 3-Arylmethylpiperazine-2,5-diones: Short Synthesis of (-)-Glyantrypine and (-)-Fumiquinazoline F
作者:Fernando Hernández、Astrid Lumetzberger、Carmen Avendaño、Mónica Söllhuber
DOI:10.1055/s-2001-16785
日期:——
The folded conformation of the 3-arylmethyl substituent in 2,5-bis-O-trimethylsilyl-3,6-dihydropyrazines derived from the corresponding piperazine-2,5-diones, shields the N(1)-position allowing monoacylation at the neighbouring nitrogen atom. This regioselectivity was used to develop a four-step total synthesis of (-)-glyantrypine and (-)-fumiquinazoline F starting from d-tryptophan methyl ester.
衍生自相应哌嗪-2,5-二酮的 2,5-双-O-三甲基甲硅烷基-3,6-二氢吡嗪中 3-芳基甲基取代基的折叠构象屏蔽了 N(1) 位,允许在相邻位置进行单酰化氮原子。利用这种区域选择性,开发了以 d-色氨酸甲酯为起始原料的 (-)-glyantrypine 和 (-)-fumiquinazoline F 的四步全合成方法。