Transition-metal carbonyl complexes derived from cyclo-octa-2,4,6- trienone and cyclohepta-2,4,6-trienone
作者:Brian F. G. Johnson、Jack Lewis、Dieter Wege
DOI:10.1039/dt9760001874
日期:——
bicyclo[4.2.0]octa-2,4-dien-7-one, the bicyclic valence isomer of (1). The reaction of tricarbonyl(η-cyclohepta-2,4,6.trienone)iron with diazomethane does not lead to ring expansion, but gives a pyraroline by regiospecific 1,3-dipolar cycloaddition. Thermolysis of the pyrazoline, and its analogue prepared using [2H2]diazomethane, yields the corresponding tricarbonyliron complexes of bicyclo[5.1.0]octa-3
酸催化的甲氧基环辛酸酯(3)水解是循环生成辛基-2,4,6-三烯酮(1)的便捷途径。(3)与dodecacarbonyl-反应triangulo -三铁三羰基,得到(η-methoxycyclo-octatetraene)铁,其在酸催化水解,得到三羰基(2-5-η-环辛2,4.6-trienone)铁(6); 使用氘代酸产生的抗胆碱能(6)-8位。用(亚苄基丙酮)三羰基铁处理(1),得到(1)的双环价异构体双环[4.2.0] octa-2,4-dien-7-one的三羰基铁配合物。三羰基(η-环庚-2,4,6。三烯酮)铁与重氮甲烷的反应不会导致环膨胀,但会通过区域特异性的1,3-偶极环加成反应生成吡咯啉。吡唑啉及其使用[ 2 H 2 ]重氮甲烷制备的类似物的热解产生相应的双环[5.1.0] octa-3,5-二烯酮的三羰基铁配合物。