Reaktion #818436

Reaktionsgleichung

(7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-acetic acid

2-benzylamino-cyclopentanecarboxylic acid ethyl ester

N-methylmorpholine

1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride

sodium ethoxide

ethanol

→

cis-N-[3-(1-benzyl-4-hydroxy-2-oxo-2,4a,5,6,7,7a-hexahydro-1H-[1]pyrindin-3-yl)-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-7-yl]-methanesulfonamide

Ausbeute 30.3%

Lösungsmittel

N,N-dimethylformamide

acetic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe solvent was removed in vacuo
2. 2
   workup.DISSOLUTIONThe crude material was redissolved in ethyl acetate (75 mL)
3. 3
   Waschenwashed twice with 1.0 M aqueous hydrochloric acid solution (50 mL)
4. 4
   TrocknenThe organic layer was then dried over sodium sulfate
5. 5
   Filtrationfiltered
6. 6
   Einengenconcentrated in vacuo
7. 7
   workup.DISSOLUTIONThe crude intermediate was redissolved in ethanol (5 mL)
8. 8
   workup.STIRRINGstirred for 2 h at 60° C
9. 9
   Temperaturto cool to 25° C.
10. 10
    Sonstigethe solvents were removed in vacuo
11. 11
    Sonstigethe residue was purified by prep-HPLC [Column Luna 5μ C18 (2) 100 Å AXIA 50×21.2 mm, 5 micron, 30%-90% in 7 min

Vorschrift

A solution of (7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-acetic acid (prepared as described in Example 1j, 0.100 g, 0.300 mmol) and 2-benzylamino-cyclopentanecarboxylic acid ethyl ester (0.074 g, 0.300 mmol) in N,N-dimethylformamide (1.5 mL) was treated with N-methylmorpholine (63.7 mg, 0.63 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (60.4 mg, 0.315 mmol) and stirred at 25° C. for 4 h. The solvent was removed in vacuo. The crude material was redissolved in ethyl acetate (75 mL) and washed twice with 1.0 M aqueous hydrochloric acid solution (50 mL). The organic layer was then dried over sodium sulfate, filtered and concentrated in vacuo. The crude intermediate was redissolved in ethanol (5 mL) and treated with a 21% w/w solution of sodium ethoxide in ethanol (448 μL, 1.2 mmol) and stirred for 2 h at 60° C. The reaction was allowed to cool to 25° C., treated with glacial acetic acid (0.4 mL), the solvents were removed in vacuo, and the residue was purified by prep-HPLC [Column Luna 5μ C18 (2) 100 Å AXIA 50×21.2 mm, 5 micron, 30%-90% in 7 min @ 30 mL/min flow rate, 0.05% trifluoroacetic acid in acetonitrile/0.05% trifluoroacetic acid in water] to afford the desired product, cis-N-[3-(1-benzyl-4-hydroxy-2-oxo-2,4a,5,6,7,7a-hexahydro-1H-[1]pyrindin-3-yl)-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-7-yl]-methanesulfonamide (47.0 mg, 0.091 mmol, 30.3%), as a white solid. 1H NMR (400 MHz, DMSO-d6) δ: 1.43-1.61 (3H, m), 1.93-2.15 (3H, m), 3.06 (3H, s), 3.80-3.90 (1H, m), 4.40-4.52 (1H, m), 4.96 (1H, d, J=14.8 Hz), 7.27-7.34 (5H, m), 7.50-7.60 (3H, m), 10.18 (1H, s). LC-MS (ESI) calcd for C23H24N4O6S2 516.11, found 517.2 [M+H+].

Quelle