Sulfuric Acid → HCID 53827548, compound

HRID 439734Notes

Reaction equation

HRID 439734 reaction equation
S(=O)(=O)(O)O.[CH:6]([C:9]([CH3:27])([N:12]1[C:16](=[O:17])[C:15]2[CH:18]=[CH:19][C:20]3[N:21]([CH3:25])[CH:22]=[CH:23][C:24]=3[C:14]=2[C:13]1=[O:26])[C:10]#[N:11])([CH3:8])[CH3:7].[OH-].[Na+].CC[O:32]CC>C(Cl)Cl.C(OCC)(=O)C>[CH:6]([C:9]([CH3:27])([N:12]1[C:16](=[O:17])[C:15]2[CH:18]=[CH:19][C:20]3[N:21]([CH3:25])[CH:22]=[CH:23][C:24]=3[C:14]=2[C:13]1=[O:26])[C:10]([NH2:11])=[O:32])([CH3:8])[CH3:7]

Participants

7

Reactant 4

HCID 1118Sulfuric AcidHCID 3283Diethyl EtherHCID 14798Sodium HydroxideHCID 53975106HCID 53975106, compound

Product 1

HCID 53827548HCID 53827548, compoundYield 25.7%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

Concentrated sulfuric acid (5.50 mL) is added slowly to a solution of 3,6-dihydro-α-isopropyl-α,6-dimethyl-1,3-dioxobenzo[1,2-b:3,4-c']dipyrrole-2(1H)-acetonitrile (5.50 g, 19.0 mmol) in methylene chloride at 10° C. Crushed ice is added. The mixture is stirred for 24 hours at ambient temperature and poured onto crushed ice, treated with 6N sodium hydroxide to pH 2, and extracted with methylene chloride. The organic layer is separated, dried (MgSO4) and concentrated vacuo to give an orange foamy residue. Flash chromatography (silica gel, ether then ethyl acetate eluents) affords the title product as a yellow foam (1.53 g, 25.7%), mp 159°-168° C.

Workup

  1. additionCrushed ice is added
  2. additionpoured
  3. customonto crushed ice
  4. extractionextracted with methylene chloride
  5. customThe organic layer is separated
  6. dry with materialdried (MgSO4)
  7. concentrationconcentrated vacuo
  8. customto give an orange foamy residue

Sources & evidence

ORD record
ord-bdd72f7e184b4b3a81d10363f7248aa4
Source dataset
uspto-grants-1996_05
Patent number
US05516751

Reaction notes

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