Monoolefin and Diene Cycloaddition Induced by Transition-Metal Carbonyls. Cyclodimerization of 5,6-Dimethylidene-7-oxabicyclo[2.21]hept-2-ene Catalyzed by Dodecacarbonyltriosmium
作者:Philippe Vioget、Massimiliano Bonivento、Raymond Roulet、Pirre Vogel
DOI:10.1002/hlca.19840670633
日期:1984.9.26
The products generated by heating 5,6-dimethylidene-7-oxabicyclo[2.2.1]hept-2-ene (1) with Fe2(CO)9, Ru3(CO)12, Os3(CO)12, Cr(CO)3(MeCN)3, (or W(CO)5(MeCN) or by treatment with Fe-atoms have been characterized by spectroscopic methods. Apart from the expected η2- and η4-complexes of the triene 1, condensation products are formed which arise from the formal [4 + 2]-cyclodimerization of 1 involving the
通过将5,6-二甲基-7-氧杂双环[2.2.1]庚-2-烯(1)与Fe 2(CO)9,Ru 3(CO)12,Os 3(CO)12,Cr加热生成的产物(CO)3(MeCN中)3,(或W(CO)5(MeCN中),或通过用铁原子治疗的特点是光谱方法除了预期η。2 -和η 4 -complexes三烯的1,从正式[4 + 2] -cyclodimerization所出现的缩合产物形成1涉及一个分子的内环双键和第二个分子的二烯部分。[4 + 2]-环二聚反应是通过在甲醇中的Os 3(CO)12催化的,得到1,4-环氧-7-甲氧基-2,3-二甲基-1,2,3,4,4a,9,9a ,10-八氢蒽(15))。Fe原子诱导立体选择性的[2 + 2]-环二聚化pf 1,它涉及其内环双键并产生二聚体8。