反应详情

温度

80 °C

Following the procedure for 419, 5-(8-bromo-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-1-isopropyl-1H-1,2,4-triazole (313.4 mg, 0.803 mmol) was dissolved in N,N-dimethyacetamide and purged with nitrogen. Added [1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (1:1) (32.8 mg, 0.04 mmol) and copper(I)iodide (15.3 mg, 0.08 mmol). Bubbled in nitrogen for 10 minutes. Added (1-(tert-butoxycarbonyl)azetidin-3-yl)zinc(II) iodide (279.8 mg, 0.80 mmol) in 2.8 mL DMA. Heated at 80° C. overnight. Complete reaction was confirmed by LCMS. Diluted reaction mixture with 1 M HCl and extracted tert-butyl 3-(2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-8-yl)azetidine-1-carboxylate with ethyl acetate. Dried over magnesium sulfate and concentrated in vacuo. Purified by flash chromatography (0 to 50% ethyl acetate in hexanes). Concentrated in vacuo and re-dissolved the residue in 10 mL 1,4-dioxane. Added 5 mL 4 N HCl in dioxane and let stir for 2 hours. Complete deprotection was confirmed by LCMS. Concentrated in vacuo purified by HPLC to give 370 (33.3 mg, 11% yield, M=1 367.1)

1. custompurged with nitrogen
2. customBubbled in nitrogen for 10 minutes
3. customComplete reaction
4. additionDiluted
5. extractionextracted tert-butyl 3-(2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-8-yl)azetidine-1-carboxylate with ethyl acetate
6. dry with materialDried over magnesium sulfate
7. concentrationconcentrated in vacuo
8. customPurified by flash chromatography (0 to 50% ethyl acetate in hexanes)
9. concentrationConcentrated in vacuo
10. dissolutionre-dissolved the residue in 10 mL 1,4-dioxane
11. additionAdded 5 mL 4 N HCl in dioxane
12. concentrationConcentrated in vacuo
13. custompurified by HPLC