Synthetic Studies on the Fluorinated Analogs for the Putative Oxindole-Type Metabolites of 5-Halotryptamines
摘要:
The suitably protected precursors for direct fluorination, N(b)-Boc di-protected 5-fluorotryptamine (13), N(b)-acetyl-N(b)-Boc protected 5-halotryptamines (15a-c), were treated with Selectfluor (TM) in MeCN/water in the presence of NaHCO(3) to give the corresponding 3-fluorooxindoles 14 and 16a-c in good yields. Removal of the protecting groups of 14 and 16a-c produced (3,5-difluorooxindol-3-yl)ethylamine (8) and N-acetyl-(3-fluoro-5-halooxindol-3-yl)ethylamines (9a-c) in excellent yields, respectively. These compounds are potentially non-epimerizable analogs for the putative metabolites of 5-fluorotryptamine (6) and N(b)-acetyl-5-halotryptamines (7a-c).
Synthetic Studies on the Fluorinated Analogs for the Putative Oxindole-Type Metabolites of 5-Halotryptamines
摘要:
The suitably protected precursors for direct fluorination, N(b)-Boc di-protected 5-fluorotryptamine (13), N(b)-acetyl-N(b)-Boc protected 5-halotryptamines (15a-c), were treated with Selectfluor (TM) in MeCN/water in the presence of NaHCO(3) to give the corresponding 3-fluorooxindoles 14 and 16a-c in good yields. Removal of the protecting groups of 14 and 16a-c produced (3,5-difluorooxindol-3-yl)ethylamine (8) and N-acetyl-(3-fluoro-5-halooxindol-3-yl)ethylamines (9a-c) in excellent yields, respectively. These compounds are potentially non-epimerizable analogs for the putative metabolites of 5-fluorotryptamine (6) and N(b)-acetyl-5-halotryptamines (7a-c).
The suitably protected precursors for direct fluorination, N(b)-Boc di-protected 5-fluorotryptamine (13), N(b)-acetyl-N(b)-Boc protected 5-halotryptamines (15a-c), were treated with Selectfluor (TM) in MeCN/water in the presence of NaHCO(3) to give the corresponding 3-fluorooxindoles 14 and 16a-c in good yields. Removal of the protecting groups of 14 and 16a-c produced (3,5-difluorooxindol-3-yl)ethylamine (8) and N-acetyl-(3-fluoro-5-halooxindol-3-yl)ethylamines (9a-c) in excellent yields, respectively. These compounds are potentially non-epimerizable analogs for the putative metabolites of 5-fluorotryptamine (6) and N(b)-acetyl-5-halotryptamines (7a-c).