4-Bromothiazole → 5-(2-Fluoro-2-thiazol-4-yl-vinyl)-2,8-dimethyl-2,3,4,5-tetrahydro-1h-pyrido[4,3-b]indole

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Reaction Conditions

Reaction Steps

4-Bromothiazole (100 mg, 0.609 mmol), 5-ethynyl-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole 163 mg, 0.731 mmol), dichlorobistrifluorophosphine palladium (12 mg, 0.01 mmol) and tetrabutylammonium fluoride trihydrate (575 mg, 1.827 mmol) were charged in a microwave vial and heated to 85° C. for 5 min in microwave oven. On completion of reaction (as observed by LCMS), the reaction mixture was poured into 20 mL water and compound extracted with EtOAc (3×50 mL). The combined organic layers were washed with water (2×50 mL) and dried over anhydrous sodium sulfate and concentrated under vacuum. The crude product (190 mg) obtained was purified by reverse phase chromatography to afford 7 mg of 5-(2-Fluoro-2-thiazol-4-yl-vinyl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole. 1H NMR (CDCl3, free base) δ (ppm): 8.80 (s, 1H), 7.60 (s, 1H), 7.38 (d, 1H), 7.18 (s, 1H), 7.05 (d, 1H), 6.22 (d, 1H), 3.80 (m, 2H), 3.0 (m, 4H), 3.62 (s, 3H), 2.40 (s, 3H).

Provenance & Evidence