Water → 4-Chloro-2-(4-formyl-piperazin-1-yl)-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid methyl ester

HRID 1695280Notes

Reaction equation

HRID 1695280 reaction equation
[CH:1]([O-])=[O:2].[Na+].[CH3:5][O:6][C:7]([C:9]1[CH:10]=[C:11]([CH3:33])[C:12]2[O:18][C:17]3[C:19]([Cl:29])=[CH:20][C:21]([N:23]4[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]4)=[CH:22][C:16]=3[CH2:15][S:14](=[O:31])(=[O:30])[C:13]=2[CH:32]=1)=[O:8].O>C(O)=O>[CH3:5][O:6][C:7]([C:9]1[CH:10]=[C:11]([CH3:33])[C:12]2[O:18][C:17]3[C:19]([Cl:29])=[CH:20][C:21]([N:23]4[CH2:24][CH2:25][N:26]([CH:1]=[O:2])[CH2:27][CH2:28]4)=[CH:22][C:16]=3[CH2:15][S:14](=[O:30])(=[O:31])[C:13]=2[CH:32]=1)=[O:8]

Participants

5

Reactant 3

HCID 962WaterHCID 2723810Sodium FormateHCID 115410724-Chloro-6-methyl-10,10-dioxo-2-piperazin-1-yl-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cyclo heptene-8-carboxylic acid methyl ester

Product 1

HCID 116841244-Chloro-2-(4-formyl-piperazin-1-yl)-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid methyl ester

Reagents, catalysts & solvents 1

HCID 284Formic AcidSolvent

Conditions

Temperature
90 °C

Procedure

Sodium formate (0.1 g, 1.37 mmol) was added to a solution of 4-chloro-6-methyl-10,10-dioxo-2-piperazin-1-yl-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid methyl ester (free base of example 16, 0.3 g, 0.68 mmol) in formic acid (85%, 5 mL), and stirred at 90° C. for 15 h. The reaction mixture was diluted using water (10 mL), extracted using ethyl acetate, washed with water and brine. Solvent was removed and the crude product was purified by column chromatography (silica gel, 1.5% methanol in chloroform) to obtain the title compound. Yield: 0.11 g, (35%); 1H NMR (DMSO-d6, 300 MHz): δ 2.62 (s, 3H, CH3), 3.17-3.24 (m, 4H, 2CH2), 3.47 (s, 4H, 2CH2), 3.85 (s, 3H, OCH3), 5.15 (s, 2H, CH2), 7.13 (s, 1H, Ar), 7.17 (s, 1H, Ar), 8.06 (s, 1H, CHO), 8.08 (t, 1H, Ar), 8.14 (d, 1H, Ar); MS: m/e (ES+) 465 (M+1); analysis: C2H21ClN2O6S.0.5 H2O requires C, 53.23,H, 4.64, N, 5.91, Cl, 7.49, S, 6.75; found: C, 53.82, H, 4.48, N, 5.42, Cl, 8.07, S, 7.17%.

Workup

  1. additionThe reaction mixture was diluted
  2. extractionextracted
  3. washwashed with water and brine
  4. customSolvent was removed
  5. customthe crude product was purified by column chromatography (silica gel, 1.5% methanol in chloroform)

Sources & evidence

ORD record
ord-51bb81964d1f4c62bd1f105eebdcf42a
Source dataset
uspto-grants-2012_04
Patent number
US08163730B2

Reaction notes

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