Patent ID: 6987202

Claim:
A phosphine compound represented by the following formula (1): wherein R 1 and R 2 each independently represents a hydrogen atom, a substituted or unsubstituted C 1-10 alkyl group, a substituted or unsubstituted C 1-10 alkoxy group, a substituted or unsubstituted C 2-10 alkenyl group, a substituted or unsubstituted di(C 1-5 alkyl)amino group, a substituted or unsubstituted, 5- to 8-membered cyclic amino group, a substituted or unsubstituted, 5- to 8-membered alicyclic group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted heterocyclic group, a trisubstituted silyl group or a halogen atom; R 3 , R 4 , R 5 and R 6 each independently represents a hydrogen atom, a C 1-5 alkyl group, a C 1-5 alkoxy group, a di(C 1-5 alkyl)amino group, a 5- to 8-membered cyclic amino group or a halogen atom; R 7 represents a C 1-5 alkyl group, a C 1-5 alkoxy group, a di(C 1-5 alkyl)amino group, a 5- to 8-membered cyclic amino group or a halogen atom; and R 3 and R 4 , R 5 and R 6 , and R 6 and R 7 may each be fused together to form a fused benzene ring, a fused, substituted benzene ring, a trimethylene group, a tetramethylene group, a pentamethylene group, a methylenedioxy group, an ethylenedioxy group or a trimethylenedioxy group.