Cyanomethylenetributylphosphorane → 3-(4-Chloro-phenyl)-1-(4-methoxy-2-methyl-benzyl)-1,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester

HRID 2106267Notes

Reaction equation

HRID 2106267 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:17][CH2:16][C:15]2[NH:14][N:13]=[C:12]([C:18]3[CH:23]=[CH:22][C:21]([Cl:24])=[CH:20][CH:19]=3)[C:11]=2[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH3:25][O:26][C:27]1[CH:34]=[CH:33][C:30]([CH2:31]Cl)=[C:29]([CH3:35])[CH:28]=1.C(C=P(CCCC)(CCCC)CCCC)#N>C1(C)C=CC=CC=1>[C:1]([O:5][C:6]([N:8]1[CH2:17][CH2:16][C:15]2[N:14]([CH2:31][C:30]3[CH:33]=[CH:34][C:27]([O:26][CH3:25])=[CH:28][C:29]=3[CH3:35])[N:13]=[C:12]([C:18]3[CH:23]=[CH:22][C:21]([Cl:24])=[CH:20][CH:19]=3)[C:11]=2[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 4622928CyanomethylenetributylphosphoraneHCID 110520871-(Chloromethyl)-4-methoxy-2-methylbenzeneHCID 672690203-(4-chloro-phenyl)-4,5,7,8-tetrahydro-1H-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester

Product 1

HCID 672695893-(4-Chloro-phenyl)-1-(4-methoxy-2-methyl-benzyl)-1,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Conditions

Temperature
110 °C

Procedure

To a solution of 3-(4-chloro-phenyl)-4,5,7,8-tetrahydro-1H-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester (Example 103, Step B; 0.4 mmol) in toluene (3 mL) was added 4-methoxy-2-methyl-benzyl chloride (0.9 mmol) and cyanomethylene-tri-n-butylphosphorane (1 mmol). The mixture was heated at 110° C. for 16 h. After concentration and purification (SiO2, EtOAc/hexanes), 3-(4-chloro-phenyl)-1-(4-methoxy-2-methyl-benzyl)-1,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester was obtained (54 mg). The other regioisomer, 3-(4-chloro-phenyl)-2-(4-methoxy-2-methyl-benzyl)-1,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester, was also obtained (86 mg). 3-(4-Chloro-phenyl)-1-(4-methoxy-2-methyl-benzyl)-1,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester (20 mg) was treated with TFA (1 mL) in CH2Cl2 (10 mL) for 4 h. After concentration of the reaction mixture, the title compound was obtained (0.02 g). MS (ESI): exact mass calculated for C22H24ClN3O, 381.16; found, m/z 382.1 [M+H]+. 1H NMR (500 MHz, CD3OD): 7.39-7.37 (m, 2H), 7.34-7.32 (m, 2H), 6.68-6.66 (br m, 1H), 6.54-6.52 (br m, 1H), 6.37 (d, J=8.3 Hz, 1H), 5.21 (s, 2H), 2.81-2.79 (m, 4H), 2.71-2.69 (m, 4H).

Workup

  1. concentrationAfter concentration and purification (SiO2, EtOAc/hexanes)

Sources & evidence

ORD record
ord-2d8df2e0acd14692adb6a9b46819dc73
Source dataset
uspto-grants-2009_08
Patent number
US07579470B2

Reaction notes

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