Transannular reactions in the dibenzo[<i>a</i>,<i>d</i>]cycloheptene series. III. Preparation of 11-substituted-10,11-dihydro-10,5-(iminomethano)-5<i>H</i>-dibenzo[<i>a</i>,<i>d</i>]cycloheptenes
作者:T. A. Dobson、M. A. Davis、A. M. Hartung
DOI:10.1139/v68-557
日期:1968.11.1
Treatment of the syn-epoxyamide 3 with either ammonium hydroxide or sodium hydride gives 10,11-dihydro-anti-11-hydroxy-10,5-(iminomethano)-5H-dibenzo[a,d]cyclohepten-13-one (1a). This compound is readily converted to the syn-epimer 1c by oxidation to 1b and subsequent hydrogenation. The ketone 1b reacts with Grignard reagents to give the tertiary alcohols 1k,l which undergo hydrogenolysis to give the
用氢氧化铵或氢化钠处理顺-环氧酰胺 3 得到 10,11-dihydro-anti-11-hydroxy-10,5-(iminomethano)-5H-dibenzo[a,d]cyclohepten-13-one (1a )。该化合物很容易通过氧化为 1b 并随后氢化而转化为顺式差向异构体 1c。酮 1b 与格氏试剂反应得到叔醇 1k,l,它经过氢解得到 11-取代的内酰胺 1q,r。用氢化铝锂还原内酰胺得到相应的胺。