Controlled reduction of 5-alkyl-3-phenyl-2,3,5,6,7,8-hexahydro-oxazolo[3,2-a]pyridin-4-ylium iodide: enantioselective synthesis of (−)-dihydropinidine and (+)-indolizidine 167B
作者:Luis F. Roa、Dino Gnecco、Alberto Galindo、Joel L. Terán
DOI:10.1016/j.tetasy.2004.09.030
日期:2004.11
reduction of (+)-(3R,5S)-5-methyl- and (+)-(3R,5S)-5-n-propyl-3-phenyl-2,3,5,6,7,8-hexahydro-oxazolo[3,2-a]pyridin-4-ylium iodide 1 and 2 to generate (3R,5S)-5-methyl- and (3R,5S)-5-n-propyl-3-phenyl-2,3,5,6,7,8-hexahydro-oxazolo[3,2-a]pyridine 3 and 4, respectively, is reported. In addition, an enantioselective synthesis of (−)-(2R,6S)-dihydropinidine and (+)-(2S,6S)-indolizidine 167B starting from
(+)-(3 R,5 S)-5-甲基-和(+)-(3 R,5 S)-5- n-丙基-3-苯基-2,3,5,6的受控还原,7,8-六氢-恶唑并[3,2- a ]吡啶-4-基碘鎓碘化物1和2生成(3 R,5 S)-5-甲基-和(3 R,5 S)-5- n据报道,分别是-丙基-3-苯基-2,3,5,6,7,8-六氢-恶唑并[3,2- a ]吡啶3和4。另外,(-)-(2 R,6 S)-二氢吡啶和(+)-(2获得了分别从3和4开始的S,6S)-吲哚唑烷167B 。