BIS(PHOSPHINE) BORONIUM SALT, PRODUCTION METHOD OF BIS(PHOSPHINE) BORONIUM SALT, AND BIS(PHOSPHINE) BORONIUM SALT PRODUCED BY THE PRODUCTION METHOD

摘要

The present invention aims to provide a bis(phosphine) boronium salt to be used as a building block or the like for producing a diphosphine compound effective mainly for various kinds of transition metal-catalyzed reactions and further to provide a preferable production method of the bis(phosphine) boronium salt and a bis(phosphine) boronium salt to be produced by the production method.;The present invention provides a bis(phosphine) boronium salt having the structure defined by the following formula (1).;