AN ANION-PROMOTED REARRANGEMENT OF 2-(<i>o</i>- AND<i>p</i>-NITROBENZYLOXY)TROPONES TO α-HYDROXYLATED 2-(<i>o</i>- AND<i>p</i>-NITROBENZYL)TROPONES. A READY INTRODUCTION OF ARALKYL GROUP INTO THE TROPONOID NUCLEUS
作者:Hitoshi Takeshita、Akira Mori、Hiroshi Suizu
DOI:10.1246/cl.1986.593
日期:1986.4.5
During the preparation of 2-(o- and p-nitrobenzyloxy)tropones from o- and p-nitrobenzyl chlorides and potassium tropolonate, a concomittant formation of α-hydroxylated 2-(o- and p-nitrobenzyl)tropones and 3-(o- and p-nitrobenzyl)tropolones was recognized. This alkali-promoted reaction has no precedent analogy in the troponoid chemistry. From the 2-(p-nitrobenzoyl)tropone, a tetrahydrobenzodiazaheptalenone, 6-(p-nitrophenyl)-5,7,11a,12-tetrahydrocyclohepta[b](1,5)benzodiazepin-7-one, was prepared.
在从邻位和对位硝基苄基氯化物和钾紫丁香酸酯制备2-(邻位和对位硝基苄基氧基)紫丁香酮的过程中,观察到伴随生成α-羟基化的2-(邻位和对位硝基苄基)紫丁香酮和3-(邻位和对位硝基苄基)紫丁香酮。这种碱催化反应在紫丁香化学中没有先例。从2-(对位硝基苯甲酰)紫丁香酮中制备了四氢苯并二氮杂七烷酮,6-(对位硝基苯基)-5,7,11a,12-四氢环庚[b](1,5)苯并二氮杂平酮-7-酮。