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Hydrochloric Acid → 8-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carboxylic acid N-isopropyl-hydrazide dihydrochloride

HRID 1498371
Notes
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Reaction equation

HRID 1498371 reaction equation
C(OC([NH:8][N:9]([C:13]([C:15]1[N:24]=[C:23]2[N:17]([CH2:18][CH2:19][O:20][C:21]3[CH:28]=[C:27]([Br:29])[CH:26]=[CH:25][C:22]=32)[CH:16]=1)=[O:14])[CH:10]([CH3:12])[CH3:11])=O)(C)(C)C.[ClH:30].O1CCOCC1>CO>[ClH:30].[ClH:30].[CH:10]([N:9]([C:13]([C:15]1[N:24]=[C:23]2[N:17]([CH2:18][CH2:19][O:20][C:21]3[CH:28]=[C:27]([Br:29])[CH:26]=[CH:25][C:22]=32)[CH:16]=1)=[O:14])[NH2:8])([CH3:12])[CH3:11]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 312751,4-DioxaneHCID 58204773N'-(8-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carbonyl)-N'-isopropyl-hydrazinecarboxylic acid tert-butyl ester

Product 1

HCID 670507018-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carboxylic acid N-isopropyl-hydrazide dihydrochloride

Reagents, catalysts & solvents 1

HCID 887
Methanol
Solvent

Conditions

Temperature
50 °C

Procedure

A solution of N′-(8-bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carbonyl)-N′-isopropyl-hydrazinecarboxylic acid tert-butyl ester (2.71 g, 5.83 mmol) in methanol (52 mL) was treated with 4N HCl in dioxane (5.83 mL, 23.3 mmol). The reaction mixture was stirred at 50° C. overnight before the reaction was concentrated in vacuo and the resultant residue triturated with diethyl ether to give 8-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carboxylic acid N-isopropyl-hydrazide dihydrochloride as a pale yellow foam (2.69 g, quantitative yield). LCMS RT=4.17 min, [M+H]+=365/367

Workup

  1. concentrationwas concentrated in vacuo
  2. customthe resultant residue triturated with diethyl ether

Sources & evidence

ORD record
ord-a88709047def4a5d85387ae0a321d291
Source dataset
uspto-grants-2015_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09198918B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes