BIS(PHOSPHINE)BORONIUM SALTS, PROCESS FOR PREPARATION OF BIS(PHOSPHINE)BORONIUM SALTS, AND BIS(PHOSPHINE)BORONIUM SALTS PREPARED BY THE PROCESS

摘要

[PROBLEMS] To provide bis(phosphine)boronium salts useful as building blocks mainly in preparing diphosphines effective in various catalytic reactions with transition metals, a favorable process for the preparation of bis(phosphine)boronium salts, and bis(phosphine)boronium salts prepared by the process. [MEANS FOR SOLVING PROBLEMS] Bis(phosphine)boronium salts characterized by having structures represented by the general formula (1): (1)