THE SYNTHESIS OF ANTHRAPHOS, A CONFORMATIONALLY RIGID, C2-SYMMETRIC DIPHOSPHINE AND THE X-RAY CRYSTAL STRUCTURE OF BF4

Article abstract of DOI:10.1016/S0040-4039(00)78351-1

Anthraphos (trans-9,10-dihydro-9,10-ethanoanthracene-11,12-bis(diphenylphosphine)) (3), a conformally rigid, C₂-symmetric diphosphine, has been prepared in three steps, the key step being the Diels-Alder reaction between anthracene and ethyndiy