A one-pot synthesis and 1,3-dipolar cycloaddition of [1,2]dithiolo[4,3-b]indole-3(4H)-thiones
作者:Lidia S. Konstantinova、Kirill A. Lysov、Stanislav A. Amelichev、Natalia V. Obruchnikova、Oleg A. Rakitin
DOI:10.1016/j.tet.2009.01.069
日期:2009.3
and DABCO in chloroform gave the corresponding [1,2]dithiolo[4,3-b]indole-3(4H)-thiones 5 by the addition of triethylamine in high yield. 1,2-Dithiole-3-thiones 5 underwent cycloaddition with one or two DMAD equivalents to afford either 2-(3-thioxo-1,3-dihydro-2H-indol-2-ylidene)-1,3-dithioles 10 or fused 4,5-dihydrothiopyrano[3,2-b]indoles 9.
用S 2 Cl 2和DABCO在氯仿中处理N-取代的2-甲基-1 H-吲哚1,得到相应的[1,2]二硫代[4,3 - b ]吲哚-3(4 H)-硫酮5。高产率地添加三乙胺。1,2-二硫代-3-硫酮5与一或两个DMAD等效物进行环加成反应,得到2-(3-硫代-1,3-二氢-2 H-吲哚-2-亚烷基)-1,3-二硫代10或稠合的4,5-二氢硫代吡喃并[3,2- b ]吲哚9。