Regioselective synthesis of mono- and bis-decahydrobenzocarbazoles via tandem reactions of α-diazo ketones
作者:Sengodagounder Muthusamy、Chidambaram Gunanathan、Eringathodi Suresh
DOI:10.1016/j.tet.2004.06.053
日期:2004.8
Regioselective intermolecular 1,3-dipolar cycloaddition reactions of rhodium generated carbonyl ylides with indoles are reported in this paper. Intermolecular 1,3-dipolar cycloaddition reactions of five-membered-ring cyclic carbonyl ylides with indole and substituted indoles afforded hexahydro-2H-carbazol-2-ones in a regioselective manner. Similarly, reactions of cyclic carbonyl ylides were carried
本文报道了铑生成的羰基化物与吲哚的区域选择性分子间1,3-偶极环加成反应。五元环环状羰基羰基化物与吲哚和取代的吲哚的分子间1,3-偶极环加成反应以区域选择性方式提供了六氢-2 H-咔唑-2-酮。类似地,进行环状羰基酰基化物的反应以提供具有高区域选择性的十氢苯并[ c ]咔唑或十氢环戊[ c ]咔唑。有趣的是,其他可能的区域异构体十氢苯并[ a]通过环羰基羰基化合物和具有吸电子取代基的吲哚反应也可以得到]咔唑。区域异构体6,11c-环氧-1,2,3,4,4a,5,6,6a,11b,11c-十氢-4a-甲基-5-氧代-7 H-苯并[ c ]咔唑的结构和立体化学和11-苯磺酰基-6,11b-环氧-2,3,4,4a,5,6,6a,11,11a,11b-十氢-4a-甲基-5-氧代-1 H-苯并[ a]单晶X射线分析明确证实了]咔唑。为了推进该研究,首次证明了具有不同芳基和烷基间隔基的双吲哚的五元环环