Pyridine → HCID 11648633, compound

HRID 1695281Notes

Reaction equation

HRID 1695281 reaction equation
[C:1](Cl)(=[O:3])[CH3:2].[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].N1C=CC=CC=1>ClCCl>[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]([C:1](=[O:3])[CH3:2])[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 1049PyridineHCID 6367Acetyl chlorideHCID 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 11648633HCID 11648633, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
20 °C

Procedure

Acetyl chloride (0.15 mL, 2.06 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 dichloromethane (15 mL) and stirred at 20° C., for 10 min. To this, pyridine (0.33 mL, 4.12 mmol) was added and the mixture was stirred further for 18 h. The solvent was removed from the mixture and water (15 mL) was added. The pH of the reaction mixture was adjusted to 3 using aqueous hydrochloric acid (10%). The solid obtained was filtered and the crude obtained was purified by column chromatography (silica gel, 2% methanol in chloroform) to obtain the title compound. Yield: 0.3 g, (91%); 1H NMR (DMSO-d6, 300 MHz): δ 2.02 (s, 3H, CH3), 2.63 (s, 3H, CH3), 3.15 (s, 2H, CH2), 3.17 (s, 2H, CH2), 3.55 (s, 4H, 2CH2), 3.85, (s, 3H, OCH3), 5.16 (s, 2H, CH2), 7.09 (d, 1H, Ar), 7.15 (d, 1H, Ar), 8.08 (t, 1H, Ar), 8.15 (t, 1H, Ar); MS: m/e (ES+) 479 (M+1).

Workup

  1. stirringthe mixture was stirred further for 18 h
  2. customThe solvent was removed from the mixture and water (15 mL)
  3. additionwas added
  4. customThe solid obtained
  5. filtrationwas filtered
  6. customthe crude obtained
  7. customwas purified by column chromatography (silica gel, 2% methanol in chloroform)

Sources & evidence

ORD record
ord-e8b70eb729524450a03ced98ab417bd8
Source dataset
uspto-grants-2012_04
Patent number
US08163730B2

Reaction notes

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