chromium dichloride; 10,10-dimethyl-5-pyridin-2-yl-6-aza-tricyclolt;7.1.1.02,7gt;undeca-2(7),3,5-triene; nickel dichloride in tetrahydrofuran 59 h; Ambient temperature;

1: With tetrahydropyrrolo[2,1-c][1,2,4]triazole carbene; (Ph)2SiH2 in N,N-dimethyl-formamide; mineral oil T=20°C; 6 h; Inert atmosphere; 2: With tetrabutyl ammonium fluoride in tetrahydrofuran; N,N-dimethyl-formamide; mineral oil T=60°C; 0.5 h; Inert atmosphere; chemoselective reaction;

chromium dichloride; 10,10-dimethyl-5-pyridin-2-yl-6-aza-tricyclolt;7.1.1.02,7gt;undeca-2(7),3,5-triene; nickel dichloride in tetrahydrofuran 56 h; Ambient temperature;

2: Br2 / CH2Cl2; CCl4 3: Na / methanol / 24 h / Ambient temperature 4: (i) tBuLi, THF, ether, pentane, (ii) /BRN= 385735/, (iii) aq. AcOH View Scheme

1: Br2 / CH2Cl2; CCl4 2: Na / methanol / 24 h / Ambient temperature 3: (i) tBuLi, THF, ether, pentane, (ii) /BRN= 385735/, (iii) aq. AcOH View Scheme

1: Na / methanol / 24 h / Ambient temperature 2: (i) tBuLi, THF, ether, pentane, (ii) /BRN= 385735/, (iii) aq. AcOH View Scheme

1: (i) nBuLi, THF, (ii) /BRN= 1209232/ 3: Br2 / CH2Cl2; CCl4 4: Na / methanol / 24 h / Ambient temperature 5: (i) tBuLi, THF, ether, pentane, (ii) /BRN= 385735/, (iii) aq. AcOH View Scheme

(i) iBu2AlH, (ii) /BRN= 385735/; Multistep reaction;