Reaction catalyst for cross-coupling and method for manufacturing aromatic compound

摘要

The object of the present invention is to provide a new organic phosphorus ligand that can efficiently promote cross-coupling reaction to obtain the target substance at high yield, as well as a method of manufacturing such ligand whose steric characteristics and electronic characteristics can be fine-tuned and which can be used to cause cross-coupling reaction at high yield. As a means for achieving the aforementioned object, a phosphine compound expressed by General Formula (1) below is provided.; (In the formula, R¹ and R² are each independently a secondary alkyl group, tertiary alkyl group, or cycloalkyl group, while R³ and R⁴ are each independently a hydrogen, aliphatic group, heteroaliphatic group, aromatic group, alicyclic group, or heterocyclic group. Note that R³ and R⁴ have no phosphorus atom and that R³ and R⁴ are not both hydrogen at the same time).