Ready Thermal DDQ Dehydrogenation of Some Methylcyclopropanes Activated by a Spiro-Fused Fluorene Group
作者:Masashi Murakami、Takashi Tsuji、Masafumi Oda、Shinya Nishida
DOI:10.1246/cl.1987.863
日期:1987.5.5
group were readily dehydrogenated by DDQ, but not by chloranil, to give a butadiene derivative, which reacted further with DDQ to afford 7-(o,o′-biphenylene)-3,4-dichloro-1,6-dicyano-9-alkylbicyclo[4.4.0]deca-3,8-diene-2,4-dione. In contrast, methylcyclopropanes substituted merely by two phenyl groups were reluctant to undergo the dehydrogenation.
一些被螺稠芴基团活化的甲基环丙烷很容易被 DDQ 脱氢,但不能被氯苯醌脱氢,得到丁二烯衍生物,然后与 DDQ 进一步反应得到 7-(o,o'-亚联苯)-3,4-二氯-1,6-二氰基-9-烷基双环[4.4.0]deca-3,8-diene-2,4-dione。相比之下,仅被两个苯基取代的甲基环丙烷不愿意进行脱氢。