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Sodium ethoxide → cis-N-{3-[1-(4-chloro-benzyl)-4-hydroxy-2-oxo-2,4a,5,6,7,7a-hexahydro-1H-[1]pyrindin-3-yl]-1,1-dioxo-1,4-dihydro-1lambda6-benzo[1,2,4]thiadiazin-7-yl}-methanesulfonamide

HRID 731385
Notes
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Reaction equation

HRID 731385 reaction equation
C([O:3][C:4]([CH:6]1[CH2:10][CH2:9][CH2:8][CH:7]1[N:11]([CH2:32][C:33]1[CH:38]=[CH:37][C:36]([Cl:39])=[CH:35][CH:34]=1)[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+]>C(O)C>[Cl:39][C:36]1[CH:37]=[CH:38][C:33]([CH2:32][N:11]2[C@@H:7]3[C@@H:6]([CH2:10][CH2:9][CH2:8]3)[C:4]([OH:3])=[C:13]([C:14]3[NH:19][C:18]4[CH:20]=[CH:21][C:22]([NH:24][S:25]([CH3:28])(=[O:26])=[O:27])=[CH:23][C:17]=4[S:16](=[O:30])(=[O:29])[N:15]=3)[C:12]2=[O:31])=[CH:34][CH:35]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 2723922Sodium ethoxideHCID 576711922-{(4-Chloro-benzyl)-[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 137194589cis-N-{3-[1-(4-chloro-benzyl)-4-hydroxy-2-oxo-2,4a,5,6,7,7a-hexahydro-1H-[1]pyrindin-3-yl]-1,1-dioxo-1,4-dihydro-1lambda6-benzo[1,2,4]thiadiazin-7-yl}-methanesulfonamideYield 26.2%

Reagents, catalysts & solvents 1

HCID 702
Ethanol
Solvent
2×

Conditions

Temperature
60 °C

Procedure

A solution of the crude 2-{(4-chloro-benzyl)-[2-(7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-acetyl]-amino}-cyclopentanecarboxylic acid ethyl ester in ethanol (20 mL) was treated with a 21% w/w solution of sodium ethoxide in ethanol (0.648 g) and stirred for 16 h at 60° C. Upon cooling, the reaction mixture was then quenched with 1.0 M aqueous hydrochloric acid solution (20 mL) and extracted with ethyl acetate (2×50 mL). The combined organic layers were washed with saturated aqueous sodium bicarbonate solution, dried over sodium sulfate, filtered, and dried in vacuo. The residue was purified by prep-HPLC [Column ODS-A 5μ 100 Å, 150×21.2 mm, 5 micron, 50%-100% in 13.5 min @ 22 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-(4-chloro-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 (72.1 mg, 0.131 mmol, 26.2% over two steps), as a white solid. 1H NMR (400 MHz, DMSO-d6) δ: 1.44-1.62 (4H, m), 1.91-2.18 (3H, m), 3.06 (3H, s), 3.78-3.94 (1H, m), 4.39-4.62 (1H, m), 4.90 (1H, d, J=15.6 Hz), 7.35-7.64 (7H, m), 10.19 (1H, s). LC-MS (ESI) calcd for C23H23ClN4O6S2 550.07, found 551.4 [M+H+].

Workup

  1. temperatureUpon cooling
  2. customthe reaction mixture was then quenched with 1.0 M aqueous hydrochloric acid solution (20 mL)
  3. extractionextracted with ethyl acetate (2×50 mL)
  4. washThe combined organic layers were washed with saturated aqueous sodium bicarbonate solution
  5. dry with materialdried over sodium sulfate
  6. filtrationfiltered
  7. customdried in vacuo
  8. customThe residue was purified by prep-HPLC [Column ODS-A 5μ 100 Å, 150×21.2 mm, 5 micron, 50%-100% in 13.5 min @ 22 mL/min flow rate, 0.05% trifluoroacetic acid in acetonitrile/0.05% trifluoroacetic acid in water]

Sources & evidence

ORD record
ord-f1e95964208544f2a775da20387136d6
Source dataset
uspto-grants-2009_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07582626B2

Reaction notes

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