Synthesis of 2-Oxa and 2-Aza Analogs of Pyrrolizidine-3,5-diones (Lukes-Sorm Dilactam)
摘要:
The synthesis of 2-oxa and 2-aza analogs of pyrrolizidine-3,5-dione (Lukes-Sorm dilactam), which has amnesia reversal activity, is reported. Optically active (+)-2-oxa and (+)-2-aza analogs [(+)-2 and (+)-3] and racemic 2-aza analog and its 1-methoxycarbonyl derivatives [(+)-3 and (+)-13 and -14] were prepared from (-)-S-pyroglutamic acid and succinimide, respectively.
Synthesis of 2-Oxa and 2-Aza Analogs of Pyrrolizidine-3,5-diones (Lukes-Sorm Dilactam)
摘要:
The synthesis of 2-oxa and 2-aza analogs of pyrrolizidine-3,5-dione (Lukes-Sorm dilactam), which has amnesia reversal activity, is reported. Optically active (+)-2-oxa and (+)-2-aza analogs [(+)-2 and (+)-3] and racemic 2-aza analog and its 1-methoxycarbonyl derivatives [(+)-3 and (+)-13 and -14] were prepared from (-)-S-pyroglutamic acid and succinimide, respectively.
Synthesis of Chiral Pyrrolidine Derivatives from (S)-Pyroglutamic Acid. I: 7-Substituted (2R,5S)-2-Aryl-1-aza-3-oxabicyclo(3.3.0)octan-8-ones, 7-Substituted (2R,5S)-2-Aryl-1-aza-3-oxabicyclo(3.3.0)oct-6-en-8-ones and 3-Substituted (S)-5-(Hydroxymethyl)-2-pyrrolidinones.
作者:Tatsuo NAGASAKA、Tomoko IMAI
DOI:10.1248/cpb.43.1081
日期:——
The following chiral pyrrolidine derivatives, 7-substituted (2R, 5S)-2-aryl-1-aza-3-oxabicyclo[3.3.0]octan-8-ones(18-24), 7-substituted (2R, 5S)-2-aryl-1-aza-3-oxabicyclo[3.3.0]oct-6-en-8-ones (25-29) and 3-substituted (S)-5-(hydroxymethyl)-2-pyrrolidinones (30-34), were synthesized starting from (S)-pyroglutamic acid and their absolute configurations were determined based on their 1H-NMR spectra.
The synthesis of 2-oxa and 2-aza analogs of pyrrolizidine-3,5-dione (Lukes-Sorm dilactam), which has amnesia reversal activity, is reported. Optically active (+)-2-oxa and (+)-2-aza analogs [(+)-2 and (+)-3] and racemic 2-aza analog and its 1-methoxycarbonyl derivatives [(+)-3 and (+)-13 and -14] were prepared from (-)-S-pyroglutamic acid and succinimide, respectively.