Intramolecular Carbenoid Reactions of Pyrrole Derivatives Efficient Syntheses of Pyrrolizinone and Dihydroindolizinone
作者:Charles W. Jefford、William Johncock
DOI:10.1002/hlca.19830660835
日期:1983.12.14
The copper-catalyzed pyrolysis of 1-diazo-3-(pyrrol-1-yl)-2-propanone (1a) and 1-diazo-4-(pyrrol-1-yl)-2-butanone (1b) in benzene solution gave 1 H-pyrrolizin-2-(3H)-one (4a) and 5,6-dihydroindolizin-7 (8H)-one (4b), respectively, in quantitative yield. Similar pyrolysis of 1-diazo-4-(3-methylindol-1-yl)-2-butanone (9) was less efficient giving 1-methylbenzo[b]-5,6-dihydroindroindolizin-7 (8H)-one
苯溶液中1-重氮-3-(吡咯-1-基)-2-丙酮(1a)和1-重氮-4-(吡咯-1-基)-2-丁酮(1b)的铜催化热解分别以定量收率得到1 H-吡咯嗪-2-(3 H)-一(4a)和5,6-二氢吲哚嗪-7(8 H)-一(4b)。1-重氮-4-(3-甲基吲哚-1-基)-2-丁酮(9)的类似热解效率较低,得到1-甲基苯并[ b ] -5,6-二氢吲哚并嗪7(8 H)-一( 10)和4-(3-甲基吲哚-1-基)-丁-1-烯-3-酮(11),产率分别为7%和24%。