A new spirogermole: its synthesis, and some aspects of its reactivity

Article abstract of DOI:10.1016/0022-328X(91)86163-K

The (6-7,8-9)-dibenzo-2,3-dimethyl-5-germa <4,4>-spironona-1,3-diene 6, the first representative of a new type of germole, has been synthesized.This spirogermole reacts with maleic anhydride and t-butylphosphaacetylene by <2 + 4> cycloadditions, which involve exclusively the 2,3-dimethylgermole moiety.The adduct 9 obtained with the phosphaalkyne undergoes a thermal decomposition leading to the corresponding phosphabenzene.