Pivalic acid → (S)-1-(3-(((4-amino-2,2-dioxido-1H-benzo[c][1,2,6]thiadiazin-5-yl)oxy)methyl)piperidin-1-yl)-2,2-dimethylpropan-1-one

Temperatur

130 °C

Pivalic acid (71 mg, 0.692 mmol), 1H-benzo[d][1,2,3]triazol-1-ol (117 mg, 0.865 mmol), and 1-(3-Dimethylaminopropyl)-3-ethyl carbodiimide HCl (166 mg, 10.8 mmol) were placed into a 20 mL microwave flask and diluted with anhydrous CAN (12 mL) then a solution of(S)-4-amino-5-(piperidin-3-ylmethoxy)-1H-benzo[c][1,2,6]thiadiazine 2,2-dioxide hydrochloride (Example 2a, 200 mg, 0.577 mmol) and TEA (320 uL, 2.30 mmol) in DMF (2 mL) was added. The mixture was heated with stirring in the microwave at 130° C. for 1 hour then cooled to room temperature, transferred to 250 mL round bottom flask and concentrated via rotary evaporation. The residue was purified via preparative RP HPLC (10 to 90% ACN in water). The pure fractions were collected and dried then diluted with water (6 mL) and NaHCO3 (100 mg) was added and the solution heated to 90° C. for 15 minutes until the entire compound dissolved. The solution was then cooled to 0° C. and neutralized with 1N HCl solution. The precipitate was collected and dried to provide the title compound (110 mg, 48%). 1H NMR (DMSO-d6, 400 MHz, 80° C.): 1.15 (s, 9H), 1.35 (m, 2H), 1.68 (br s, 1H), 1.85 (br s, 1H), 2.05 (br s, 1H), 2.83 (br s, 2H), 2.16 (br s, 2H), 4.06 (d, J=8 Hz, 2H), 4.12 (d, J=12 Hz, 1H), 4.20 (d, J=16 Hz, 1H), 6.60 (d, J=8 Hz, 1H), 6.76 (d, J=8 Hz, 1H), 7.44 (t, J=8 Hz, 1H), 7.78 (s, 1H), 8.37 (s, 1H), 10.93 (s, 1H). M+H=395.

1. temperatureThe mixture was heated
2. temperaturethen cooled to room temperature
3. customtransferred to 250 mL round bottom flask
4. concentrationconcentrated via rotary evaporation
5. customThe residue was purified via preparative RP HPLC (10 to 90% ACN in water)
6. customThe pure fractions were collected
7. customdried
8. additionthen diluted with water (6 mL) and NaHCO3 (100 mg)
9. additionwas added
10. temperaturethe solution heated to 90° C. for 15 minutes until the entire compound
11. dissolutiondissolved
12. temperatureThe solution was then cooled to 0° C. and neutralized with 1N HCl solution
13. customThe precipitate was collected
14. customdried

ORD-Eintrag

ord-c80f2abbeb8847b0a1d1105ab4df862c

Quelldatensatz

uspto-grants-2016_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09420814B2