Sulfuric Acid → HCID 53827548, compound

HRID 1031032Notes

Reaction equation

HRID 1031032 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-a-isopropyl-a,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 in 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 in vacuo
  8. customto give an orange foamy residue

Sources & evidence

ORD record
ord-fb72670950b445948f8134beb615a573
Source dataset
uspto-grants-1992_04
Patent number
US05108485

Reaction notes

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