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Enantioselective Synthesis of Hydantoin and Diketopiperazine-Fused Tetrahydroisoquinolines via Pictet-Spengler Reaction

机译:乙藻和二酮哌嗪 - 融合四氢异喹啉的致注重辅助合成 - Spengler反应

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摘要

An enantioselective synthesis of iso-, isothio-, and isoselenohydantoin and diketopiperazine-fused tetrahydroisoquinolines from L-Dopa was reported. The route consists of an Pictet-Spengler reaction of (S)-2-amino-3-(3,4-dimethoxyphenyl)propanoates with various aldehydes to afford diastereomeric tetrahydroisoquinolines. Next step, the tetrahydroisoquinolines were further reacted with iso-, isothio-, or isoselenocyanates to construct hydantoin. Similarly, the diketopiperazine moiety was constructed by subjecting tetrahydroisoquinolines to a condensation reaction with chloroacetyl chloride followed by nucleophilic addition with various primary amines.
机译:据报道了来自L-DOPA的iso-,异硫酸和伊索伦洛霉素和二酮哌嗪稠合的四氢异喹啉的对映选择性合成。 该路线由(S)-2-氨基-3-(3,4-二甲氧基苯基)丙烷丙氨酸的丙甲酯 - Spengler反应组成,具有各种醛,得到非对映氨基四羟基异喹啉。 下一步骤,将四氢异喹啉与异,异噻唑或异糖蛋白硅酸酯进一步反应以构建乙烃。 类似地,通过使四氢异喹啉对氯乙酰氯进行缩合反应,然后用各种伯胺进行亲核来构建二酮哌嗪部分。

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