New Tandem Ring Enlargements of Bicyclo[3.3.0]octanes to Bicyclo[5.5.0]dodecanes and Subsequent Conversions into Tricyclo[5.5.0.0.2,9]dodecane and Tricyclo[5.5.0.02,10]dodecane Derivatives
作者:Eckehard Volker Dehmlow、Hans-Jörg Breyholz、Beate Neumann、Anja Stammler、Hans-Georg Stammler
DOI:10.1002/1099-0690(200104)2001:7<1413::aid-ejoc1413>3.0.co;2-8
日期:2001.4
Potential precursors of tetracyclo[5.5.0.04,10]dodecatetraenes B were synthesized by means of ring enlargements of bicyclo[3.3.0]octanes to bicyclo[5.5.0]dodecanes through enol ether/ketene additions and Michael-induced reactions. Base-catalyzed or oxidative ring closures of the highly functionalized compounds that were obtained (most conspicuously 12 and 17) gave other polycyles (13, 14, 20). Unexpectedly
通过环烯醚/乙烯酮加成反应和迈克尔诱导的反应,通过将双环[3.3.0]辛烷环扩环成双环[5.5.0]十二烷,合成了四环[5.5.0.0 4,10 ]十二碳四烯B的潜在前体。得到的是(最显着的高度官能化的化合物的碱催化或氧化环封闭件12和17),得到其他polycyles(13,14,20)。出乎意料的是,双环辛烷二酮15与丁二酸二甲酯反应生成了双(环己二烯基)衍生物18以及预期的双环十二烷衍生物17。