An unusual thioketal formation: Attempted synthesis of 2,3-dibromo-6,7-benzobicyclo[3.2.1]octa-2, 6-diene
作者:Yavuz Taşkesenligil、Metin Balci
DOI:10.1016/0040-4020(95)00414-4
日期:1995.7
Treatment of 8 with 2 equiv. of NBS gave terra bromide 9 which was converted to the corresponding unsaturated ketone 7. Reaction of 7 with 1,2-ethanedithiol produced the unusual thioketal 14 besides normal ketalization product 13. Reduction of 13 with Raney nickel resulted in the formation of hydrocarbon 17, instead of the expected dibromide 4.
2当量治疗8。经NBS测定,得到了溴化甲烷9,将其转化为相应的不饱和酮7。7与1,2-乙二硫醇的反应除了正常的缩酮化产物13外,还产生了不寻常的硫缩酮14。用阮内镍还原13导致形成烃17,而不是预期的二溴化物4。