[N:1]1([C:7]2[S:8][CH:9]=[C:10]([Sn](C)(C)C)[N:11]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[Br:16]C1SC=C(Br)N=1.O>N1CCCCC1>[N:1]1([C:7]2[S:8][CH:9]=[C:10]([Br:16])[N:11]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1Synthesis of 2-Piperidinyl-4-(trimethylstannyl)thiazole 373 as illustrated in FIG. 53. 2,4-Dibromothiazole (358; 1.0 equiv) was dissolved in piperidine (0.5 M) and the reaction was warmed to 50° C. for 8 h, upon which completion of the reaction was indicated by TLC. The mixture was poured into water and extracted with ether (2×). Drying (MgSO4) and evaporation of the solvents gave 2-piperidinyl-4-bromothiazole 372, which was isolated after flash column chromatography (silica gel, 5% EtOAc in hexanes) in 100% yield.
Wird geladen…
