Synthesis of 1,3,4-oxa(or thia)diazaheterocycles starting from 2-(pyrrol-1'-y1)phthalimide
作者:Anita Guesdon、Alain Fogain-Ninkam、Bernard Decroix、Pierre Netchitaïlo
DOI:10.1002/jhet.5570380629
日期:2001.11
1-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-1H-pyrrol-2 carbaldehyde 4 was synthesized by Vilsmeier-Haack reaction from 2-(pyrrol-1-yl) phthalimide. Reduction of 4 by sodium borohydride, or action of Grignard reagents on 4 led to the corresponding alcohols 5 which were cyclized to pyrroloxadiazino isoin-doles 1 by heating in the presence of silica gel. Transformation of the hydroxylactam 6 with acetic
通过Vilsmeier-Haack反应由2-(吡咯-1-基)合成1-(1,3-二氧代-1,3-二氢-2 H-异吲哚-2-基)-1 H-吡咯-2甲醛4邻苯二甲酰亚胺。通过硼氢化钠还原4或格氏试剂对4的作用产生相应的醇5,其通过在硅胶存在下加热而被环化成吡咯烷二氮杂异吲哚1。羟基内酰胺6用乙酸衍生物的转化产生了酯7,其在皂化后通过分子内环化得到吡咯烷(或硫杂)二氮杂异吲哚并酮2。