2-(Tributylstannyl)pyridine → HCID 6417974, compound
Reaction equation
Cl[C:2]1[N:7]=[N:6][C:5]([C:8]2[N:9]=[N:10][C:11](Cl)=[CH:12][CH:13]=2)=[CH:4][CH:3]=1.C([Sn](CCCC)(CCCC)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][N:21]=1)CCC>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N:21]1[CH:22]=[CH:23][CH:24]=[CH:25][C:20]=1[C:2]1[N:7]=[N:6][C:5]([C:8]2[N:9]=[N:10][C:11]([C:22]3[CH:23]=[CH:24][CH:25]=[CH:20][N:21]=3)=[CH:12][CH:13]=2)=[CH:4][CH:3]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
Stille coupling starting from the 6,6′-dichloro-3,3′-bipyridazine 17 was subsequently carried out in the presence of two mol of tributylstannylpyridine 18 and 10% of Pd(PPh3)4 catalyst, so as to give a new 6,6′-bis(pyridin-2-yl)-3,3′-bipyridazine 19 with a yield of 62% (Scheme 8). In parallel, the formation of the homocoupling product 21 (23%) was observed. The use of an excess of organostannane makes the purification of the dimer more difficult.