1,2-diiodo-3,3-dimethylbut-1-ene was synthesized used 3,3-dimethylbut-1-yne as the initial materials and Ce2 (SO4 )3 as catalyst in H2O. Then 5,5-dimethyl-l-(o-aminophenyl) -1,3-hexadiyne was synthesized from 1,2-diiodo-3,3-dimethylbut-1-ene and 2-ethynylaniline by cross-coupling rection in the presence of PS(OAc)2 and CuI. The total yield was 68.7 %. The structu...