Ammonium iodide → 2'-amino-6-bromo-1'-methyl-2-phenylspiro[chroman-4,4'-imidazol]-5'(1'H)-one

HRID 2096449Notes

Reaction equation

HRID 2096449 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:11]3([C:15](=[O:16])[N:14]([CH3:17])[C:13](SC)=[N:12]3)[CH2:10][CH:9]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[O:8][C:5]2=[CH:6][CH:7]=1.[NH4+:26].[I-].N.CCO>>[NH2:26][C:13]1[N:14]([CH3:17])[C:15](=[O:16])[C:11]2([C:4]3[C:5](=[CH:6][CH:7]=[C:2]([Br:1])[CH:3]=3)[O:8][CH:9]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[CH2:10]2)[N:12]=1

Participants

4

Reactant 3

HCID 25487Ammonium iodideHCID 22020343Ethanol, reaction products with ammonia, distn. residuesHCID 58423832HCID 58423832, compound

Product 1

HCID 584237682'-amino-6-bromo-1'-methyl-2-phenylspiro[chroman-4,4'-imidazol]-5'(1'H)-oneYield 38.3%

Procedure

A solution of 6-bromo-1′-methyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (59 mg, 0.142 mmol), NH4I (41.5 mg, 0.286 mmol) in a solution of NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (21 mg, 38%). 1H-NMR (MeOD): 2.04 (d, 1H), 2.15 (dd, 1H), 4.51 (m, 1H), 5.75 (d, 1H), 6.78 (m, 1H), 6.99 (d, 1H), 7.20-7.26 (m, 2H), 7.26-7.35 (m, 4H).

Workup

  1. temperatureAfter cooling
  2. concentrationthe mixture was concentrated in vacuo
  3. customto give a residue, which
  4. customwas purified by preparative TLC

Sources & evidence

ORD record
ord-8844646ace904ca5ab88b081451291e6
Source dataset
uspto-grants-2013_05
Patent number
US08450308B2

Reaction notes

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