Technical Notes:

1.Catalyst used for the selective hydration of substituted alkynes at room temperature without acidic promoters .

2.Gold(I) catalyzes bromination of terminal alkynes .

3.Sequential O-H/C-H bond insertion of phe nols initiated by the gold(I) - catalyzed cyclization of 1-bromo-1，5-enynes

4.L igand- controlled gold catalyzed cycloisomerization of 1,n-enyne esters toward synthesis of dihydronaphthalene.

References: 1.J. Org. Chem., 2009, 74, 2067. 2.ACS Catalysis, 2011, 1, 601. 3.Org. L etts., 2015, 17, 1982 4.Chem. Commun., 2016, 52, 7687.