Synthesis of Phthalideisoquinoline and Protoberberine Alkaloids and Indolo[2,1-<i>a</i>]isoquinolines in a Divergent Route Involving Palladium(0)-Catalyzed Carbonylation<sup>1</sup>
作者:Kazuhiko Orito、Mamoru Miyazawa、Ryo Kanbayashi、Masao Tokuda、Hiroshi Suginome
DOI:10.1021/jo982451w
日期:1999.9.1
hydride in tetrahydrofuran gave the threo-isomer 20 in preference to the erythro 19. On the basis of studies on palladium(0)-catalyzed carbonylation of 2-bromo-3,4-dimethoxybenzyl alcohol to 6,7-dimethoxyphthalide, amino alcohol 19 or 20 was treated with a catalytic amount of palladium(II) acetate and triphenylphosphine in an atmosphere of carbon monoxide in the presence of chlorotrimethylsilane and potassium
通过在含碳酸钾的N,N-二甲基甲酰胺中加热得到2,3,8,9-或2,3,9,10-烷氧基取代的5,6-来实现赤氨基氨基醇19的一锅环化。 dihydroindolo [2,1-a] isoquinolines 3,具有二苯并吡咯啉碱生物碱的独特四环骨架特征。类似地,发现在过量碳酸钾存在下,钯(0)催化1-(2'-溴苄基)四氢异喹啉21的羰基化反应生成8-氧代berbines 22,经氢化铝锂还原后可转化为原小ber碱生物碱4 。具有二苯并吡咯啉碱生物碱的独特四环骨架特征。类似地,发现在过量碳酸钾存在下,钯(0)催化1-(2'-溴苄基)四氢异喹啉21的羰基化反应生成8-氧代berbines 22,经氢化铝锂还原后可转化为原小ber碱生物碱4 。具有二苯并吡咯啉碱生物碱的独特四环骨架特征。类似地,发现在过量碳酸钾存在下,钯(0)催化1-(2'-溴苄基)四氢异喹啉21的羰基化反应生成8-氧代berbines