Fluoroboron compound, aminomethylating agent for aromatic ring made of the same, and production method of compound containing aminomethyl aromatic ring using aminomethylating agent

A fluoroboron compound or a dimer of the fluoroboron compound, or solvates of the fluoroboron compound and the dimer, the fluoroboron compound being represented by a formula (I):

• Ra(Rb)N—CH2—BF3M (I)
• wherein Ra and Rb each independently represents a group selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-6 alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, a protecting group of an amino group, a protecting group of an amino group formed by joining a nitrogen atom bonded with Ra and Rb and a substituted or unsubstituted heterocyclic group, which may contain 1 or more heteroatoms by an optional choice, formed by joining a nitrogen atom bonded with Ra and Rb, and
• M represents an alkali metal cation, and
• wherein potassium n-butylaminomethyl trifluoroborate, potassium cyclohexylaminomethyl trifluoroborate, potassium N-pyrrolidinylmethyl trifluoroborate, and potassium N-piperidylmethyl trifluoroborate are excluded from formula (I), and
• wherein substituted means a substituent group is attached selected from:
• halogen, amino, mono- or di-alkylamino, nitro, cyano, C1-6 alkyl, C1-6 alkoxy, and C3-8 cycloalkyl, and
• wherein heterocyclic group means a non-aromatic hydrocarbon cyclic group having 1 or more heteroatoms.