trans (1S,2S)-2-(5-iodo-1H-indol-3-yl)-cyclopentanecarboxaldehyde;(1S,2S)-2-(5-iodo-1H-indol-3-yl)-cyclo-pentanecarbaldehyde;(1S,2S)-2-(5-iodo-1H-indol-3-yl)cyclopentane-1-carbaldehyde
Enantioselective Synthesis of a Highly Potent Selective Serotonin Reuptake Inhibitor. An Application of Imidazolidinone Catalysis to the Alkylation of Indoles with an α,β-Disubstituted α,β-Unsaturated Aldehyde
摘要:
[GRAPHICS]The synthesis of the highly potent and selective serotonin reuptake inhibitor 1 (BMS-594726) is described. In the key construction step, an enantioselective alkylation of the indole nucleus with an a-branched alpha,beta-unsaturated aldehyde 7 was accomplished utilizing MacMillan's imidazolidinone catalyst 3b. A rationale is presented for the unexpected stereochemical result, as well as the novel reactivity of the alpha-branched substrate.