Methyl Isocyanate → HCID 19003081, compound

HRID 1613460Notes

Reaction equation

HRID 1613460 reaction equation
[OH:1][C:2]1[CH:10]=[CH:9][C:8]2[N:7]([CH3:11])[C:6]3[C:12](=[O:15])[CH2:13][CH2:14][C:5]=3[C:4]=2[CH:3]=1.N12CCCN=C1CCCCC2.[CH3:27][N:28]=[C:29]=[O:30]>C(Cl)Cl>[CH3:27][NH:28][C:29]([O:1][C:2]1[CH:10]=[CH:9][C:8]2[N:7]([CH3:11])[C:6]3[C:12](=[O:15])[CH2:13][CH2:14][C:5]=3[C:4]=2[CH:3]=1)=[O:30]

Participants

5

Reactant 3

HCID 12228Methyl IsocyanateHCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 15818737HCID 15818737, compound

Product 1

HCID 19003081HCID 19003081, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

7-Chloroacetyloxy-1,4-dihydro-4-methylcyclopent[b]indol-3(2H)-one (5.0 g) was suspended in EtOH (100 ml), and thereafter 10% NaOH solution (50 ml) was added and the mixture was stirred at room temperature for 3 hours. The mixture was concentrated in vacuo, CH2Cl2 (100 ml) was added followed by 10% HCl until the aqueous layer was neutralized. The layers were separated and the aqueous phase extracted with CH2Cl2 (2×100 ml). The organic portion was dried (Na2SO4) and concentrated and the residue was recrystallized from 95% EtOH to provide 1,4-dihydro-7-hydroxy-4-methylcyclopent[b]indol-3(2H)-one as an off-white solid. The phenol was dissolved in CH2Cl2 (100 ml), and thereafter 1,8-diazabicyclo[5.4.0]undec-7-ene (0.4 g) was added followed by methyl isocyanate (1.4 g) and the mixture was stirred overnight. The mixture was concentrated in vacuo to afford an oily solid which was crystallized from EtOH to provide 1,4-dihydro-7-methylaminocarbonyloxy-4-methylcyclopent[b] indol-3(2H)-one (1.1 g).

Workup

  1. concentrationThe mixture was concentrated in vacuo
  2. customto afford an oily solid which
  3. customwas crystallized from EtOH

Sources & evidence

ORD record
ord-24e766da9be84f41b3451540135eb7a7
Source dataset
uspto-grants-1993_03
Patent number
US05192789

Reaction notes

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