A versatile new strategy for the synthesis of tropolones
作者:Martin G. Banwell、René Onrust
DOI:10.1016/s0040-4039(00)88954-6
日期:1985.1
Swern-type oxidation of various 7-halogenobicyclo[4.1.0]heptane-2,3- or -3,4-diols affords the corresponding bicyclic diketones which undergo in situ ring expansion and loss of hydrogen halide to give α-tropolones in high yield. The quantitative conversion of the isolable 1,4-diketone 26 into the γ-tropolone acetate 27 has been achieved.