1: trimethylsilylacetylene With n-butyllithium in diethyl ether; hexane T=-30 - 0°C; 1.5 h; Inert atmosphere; 2: 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane in diethyl ether; hexane T=-50°C; Inert atmosphere; 3: With hydrogenchloride in diethyl ether T=-50 - -10°C; 1.5 h; Inert atmosphere;

C31H43IrN2Si in toluene T=20°C; 0.216667 h; GloveboxInert atmosphere; chemoselective reaction;

cis-[(PPh3)2Pt(B(1,2-O2-4-tBuC6H3))2] in toluene N2-atmosphere; 80°C;

in further solvent(s) compd. reacted with BnN3 in DCB at 110°C for 24 h; regioisomer ofcycloadduct was observed by HMBC experiment; regioselectivity >98:2;

1: methyl 3-bromocoumalate; trimethylsilylethynylboronic acid pinacol ester in 1,3,5-trimethyl-benzene T=155°C; 16 h; Inert atmosphere; 2: With dihydrogen peroxide; sodium carbonate in ethanol T=20°C; 3: trifluoromethylsulfonic anhydride With N-ethyl-N,N-diisopropylamine in dichloromethane T=0 - 20°C; regioselective reaction;

1: methyl 3-bromocoumalate; trimethylsilylethynylboronic acid pinacol ester in 1,3,5-trimethyl-benzene T=155°C; 16 h; Inert atmosphere; 2: With dihydrogen peroxide; sodium carbonate in ethanol T=20°C; 3: trifluoromethylsulfonic anhydride With N-ethyl-N,N-diisopropylamine in dichloromethane T=0 - 20°C; regioselective reaction;