Sodium Carbonate → 5-(2-bromo-4-(trifluoromethyl)phenyl)-N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)naphthalene-2-sulfonamide

Temperatur

50 °C

A reaction vessel was charged with N-(2,4-dimethoxybenzyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-(1,2,4-thiadiazol-5-yl)naphthalene-2 sulfonamide (Intermediate E) (4 g, 7.05 mmol), 2-bromo-1-iodo-4-(trifluoromethyl)benzene (4.95 g, 14.10 mmol) and Pd(dppf)Cl2 DCM (1.151 g, 1.410 mmol). Dioxane (35.2 mL) and t-butanol (35.2 mL) were added to the reaction mixture followed by sodium carbonate in water (1.9 M) (11.13 mL, 21.15 mmol). The reaction vial was then swept with nitrogen and sealed with a screw cap. The resulting mixture was then heated to 50° C. and stirred for 4 hours. LC/MS indicated that the product was formed. The resulting mixture was transferred to a separatory funnel containing water and the aqueous layer was washed three times with DCM. The organic layers were combined, dried with MgSO4, filtered and concentrated to a dark oil which was purified by MPLC using 120 g silica gel column eluting with 0 to 70% EtOAc in heptane) to afford 5-(2-bromo-4-(trifluoromethyl)phenyl)-N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)naphthalene-2-sulfonamide (3.27 g, 4.92 mmol) as a white solid. m/z (ESI) 685.8 [M+Na]+.

1. customsealed with a screw
2. customcap
3. customwas formed
4. customThe resulting mixture was transferred to a separatory funnel
5. washthe aqueous layer was washed three times with DCM
6. dry with materialdried with MgSO4
7. filtrationfiltered
8. concentrationconcentrated to a dark oil which
9. customwas purified by MPLC
10. washeluting with 0 to 70% EtOAc in heptane)

ORD-Eintrag

ord-1ea78afd9bd748e99a1c5f0a0d66a9eb

Quelldatensatz

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09012443B2