4-Methylphenyl isocyanate → 4-(6,7-Dimethoxy-quinazolin-4-yl)-piperidine-1-carboxylic acid p-tolylamide

HRID 657228Notes

Reaction equation

HRID 657228 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][C:12]=1[O:13][CH3:14])[N:9]=[CH:8][N:7]=[C:6]2[CH:15]1[CH2:20][CH2:19][NH:18][CH2:17][CH2:16]1.[N:21]([C:24]1[CH:29]=[CH:28][C:27]([CH3:30])=[CH:26][CH:25]=1)=[C:22]=[O:23]>CN(C=O)C>[C:27]1([CH3:30])[CH:28]=[CH:29][C:24]([NH:21][C:22]([N:18]2[CH2:19][CH2:20][CH:15]([C:6]3[C:5]4[C:10](=[CH:11][C:12]([O:13][CH3:14])=[C:3]([O:2][CH3:1])[CH:4]=4)[N:9]=[CH:8][N:7]=3)[CH2:16][CH2:17]2)=[O:23])=[CH:25][CH:26]=1

Participants

4

Reactant 2

HCID 693254-Methylphenyl isocyanateHCID 595517346,7-Dimethoxy-4-(piperidin-4-yl)quinazoline

Product 1

HCID 587707444-(6,7-Dimethoxy-quinazolin-4-yl)-piperidine-1-carboxylic acid p-tolylamideYield 84.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 6,7-dimethoxy-4-piperidin-4-yl-quinazoline (20 mg, 0.0733 mmol), as prepared in Example 1d, in DMF (1 mL) was treated with 1-isocyanato-4-methyl-benzene (15 mg, 0.113 mmol) at RT overnight. The reaction was then partitioned between EtOAc (10 mL) and H2O (10 mL). The organic phase was dried over Na2SO4 and concentrated in vacuo. Purification by prep tlc (1:9 MeOH/DCM) afforded the title compound as a brown solid (25.1 mg, 84%). 1H NMR (300 MHz, CDCl3) δ 9.09 (s, 1H), 7.26-7.21 (m, 3H), 7.12 (m, 3H), 6.37 (br s, NH), 4.30-4.26 (m, 2H), 4.07 (s, 6H), 3.60 (m, 1H), 3.18 (m, 2H), 2.30 (s, 3H), 2.17 (m, 2H), 2.01-1.98 (m, 2H); LC/MS (ESI) calcd mass 406.2, found 407.3 [M+1]+.

Workup

  1. customThe reaction was then partitioned between EtOAc (10 mL) and H2O (10 mL)
  2. dry with materialThe organic phase was dried over Na2SO4
  3. concentrationconcentrated in vacuo
  4. customPurification by prep tlc (1:9 MeOH/DCM)

Sources & evidence

ORD record
ord-c36b83e5d0ab4f91b8574ca5eac9cc5e
Source dataset
uspto-grants-2011_12
Patent number
US08071768B2

Reaction notes

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