Hydrochloric Acid → N-[3-[(4aS,7aR)-1-(3,3-dimethylbutyl)-4-hydroxy-2-oxo-5,6,7,7a-tetrahydro-4aH-cyclopenta[b]pyridin-3-yl]-1,1-dioxo-4H-1$l^{6},2,4-benzothiadiazin-7-yl]methanesulfonamide

HRID 731288Notes

Reaction equation

HRID 731288 reaction equation
C([O:3][C:4]([C@@H:6]1[CH2:10][CH2:9][CH2:8][C@@H:7]1[N:11]([CH2:32][CH2:33][C:34]([CH3:37])([CH3:36])[CH3:35])[C:12](=[O:31])[CH2:13][C:14]1[NH:19][C:18]2[CH:20]=[CH:21][C:22]([NH:24][S:25]([CH3:28])(=[O:27])=[O:26])=[CH:23][C:17]=2[S:16](=[O:30])(=[O:29])[N:15]=1)=O)C.[O-]CC.[Na+].Cl>C(O)C.C(OCC)(=O)C>[CH3:35][C:34]([CH3:37])([CH3:36])[CH2:33][CH2:32][N:11]1[C:12](=[O:31])[C:13]([C:14]2[NH:19][C:18]3[CH:20]=[CH:21][C:22]([NH:24][S:25]([CH3:28])(=[O:27])=[O:26])=[CH:23][C:17]=3[S:16](=[O:29])(=[O:30])[N:15]=2)=[C:4]([OH:3])[C@@H:6]2[C@H:7]1[CH2:8][CH2:9][CH2:10]2

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 2723922Sodium ethoxideHCID 69066044cis-2-{(3,3-Dimethylbutyl)-[2-(7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1lambda6-benzo[1,2,4]thiadiazin-3-yl)acetyl]amino}-cyclopentanecarboxylic acid ethyl ester

Product 1

HCID 136117774N-[3-[(4aS,7aR)-1-(3,3-dimethylbutyl)-4-hydroxy-2-oxo-5,6,7,7a-tetrahydro-4aH-cyclopenta[b]pyridin-3-yl]-1,1-dioxo-4H-1$l^{6},2,4-benzothiadiazin-7-yl]methanesulfonamideYield 46%

Reagents, catalysts & solvents 2

HCID 702EthanolSolvent2×HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

To a solution of cis-2-{(3,3-dimethylbutyl)-[2-(7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)acetyl]amino}-cyclopentanecarboxylic acid ethyl ester (125.8 mg, 0.226 mmol) in absolute ethanol (10 mL) was added a 21% w/w solution of sodium ethoxide in ethanol (0.84 mL, 2.25 mmol). After stirring at 60° C. for 4 h, the mixture was diluted with ethyl acetate and acidified with 1.0 M aqueous hydrochloric acid solution to pH 1. The organic layer was separated and the aqueous layer was extracted with ethyl acetate (2×20 mL). The combined organic layers were dried over anhydrous magnesium sulfate and concentrated in vacuo. The crude mixture was purified by flash column chromatography (Teledyne Isco RediSep Flash Column; 0-100% ethyl acetate in hexanes) to afford the desired product, cis-N-{3-[2-(3,3-dimethylbutyl)-5-hydroxy-3-oxo-2-aza-bicyclo[4.3.0]non-4-en-4-yl]-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-7-yl}-methanesulfonamide (52.7 mg, 0.103 mmol, 46%), as an off-white solid. 1H NMR (400 MHz, DMSO-d6) δ 0.94 (9H, s), 1.56-1.57 (5H, m), 2.08-2.15 (3H, m), 3.05 (3H, s), 3.17 (1H, bs), 3.34 (1H, bs), 3.64-3.72 (1H, m), 3.90 (1H, bs), 7.48-7.60 (3H, m), 10.17 (1H, bs). LC-MS (ESI) calcd for C22H30N4O6S2 510.16, found 511.4 [M+H+]. Anal. calcd for C22H30N4O6S2 0.3H2O: C, 51.20; H, 5.98; N, 10.86; S, 12.43, found C, 51.39; H, 5.81; N, 10.65; S, 12.26.

Workup

  1. customThe organic layer was separated
  2. extractionthe aqueous layer was extracted with ethyl acetate (2×20 mL)
  3. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe crude mixture was purified by flash column chromatography (Teledyne Isco RediSep Flash Column; 0-100% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-0be50f1d73624752a0f6f4c192e29ce1
Source dataset
uspto-grants-2009_09
Patent number
US07582626B2

Reaction notes

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