JT Fan, XH Fan, CY Gao, J Wei… - Organic Chemistry …, 2022 - pubs.rsc.org
A simple catalytic system of Ni (PPh3) 2Cl2/dppb or dppm/Zn can effect an efficient and
regioselectively controlled alkyne cyclotrimerization to form 1, 2, 4-(with no additive) or 1, 3 …