作者:Jürgen Martens、Stefan Lübben、Irmtraud Behrens、Ralf Janke
DOI:10.1055/s-1989-27450
日期:——
A Simple Synthesis of New Ring-Fused Pyrroles (2S,4R)-4-Hydroxy-N-[(2R,S)-2-hydroxyalkyl]prolines are converted into 3-alkyl-1-oxo-3,4-dihydro-1H-pyrrolo[2,1-c]oxazines in the presence of air and catalytic amounts of trifluoroacetic acid. Similar treatment of (2S,4R)-4-hydroxy-N-[(2R,S)-2 -hydroxycyclohexyl]prolin affords 4-oxo-5a,6,7,8,9,9a-hexahydro-4H -pyrrolo[2,1-c]benzoxazine.
一种新的环状吡咯的简单合成方法 在空气和催化量的三氟乙酸存在下,将 (2S,4R)-4-羟基-N-[(2R,S)-2-羟基烷基]脯氨酸转化为 3-烷基-1-氧代-3,4-二氢-1H-吡咯并[2,1-c]恶嗪。对 (2S,4R)-4-羟基-N-[(2R,S)-2-羟基环己基]脯氨酸进行类似处理,可得到 4-氧代-5a,6,7,8,9,9a-六氢-4H-吡咯并[2,1-c]苯并恶嗪。