Iodoethane → Ethyl 3-(3-chloro-5-{5-[3-chloro-4-(ethyloxy)phenyl]-1,2,4-oxadiazol-3-yl}-1H-indol-1-yl)propanoate

HRID 423358Notes

Reaction equation

[Cl:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[C:8]([C:11]3[N:15]=[C:14]([C:16]4[CH:21]=[CH:20][C:19]([OH:22])=[C:18]([Cl:23])[CH:17]=4)[O:13][N:12]=3)[CH:9]=2)[N:4]([CH2:24][CH2:25][C:26]([O:28][CH2:29][CH3:30])=[O:27])[CH:3]=1.C([O-])([O-])=O.[K+].[K+].[CH2:37](I)[CH3:38].CCOC(C)=O>CN(C=O)C>[Cl:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[C:8]([C:11]3[N:15]=[C:14]([C:16]4[CH:21]=[CH:20][C:19]([O:22][CH2:37][CH3:38])=[C:18]([Cl:23])[CH:17]=4)[O:13][N:12]=3)[CH:9]=2)[N:4]([CH2:24][CH2:25][C:26]([O:28][CH2:29][CH3:30])=[O:27])[CH:3]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To ethyl 3-{3-chloro-5-[5-(3-chloro-4-hydroxyphenyl)-1,2,4-oxadiazol-3-yl]-1H-indol-1-yl}propanoate (D108) (180 mg, 0.40 mmol) and K2CO3 (138 mg, 1.0 mmol) in dry DMF (3 ml) was added ethyl iodide (78 mg, 0.50 mmol) and the mixture heated at 80° C. with stirring for 30 minutes. Cooled mixture and added EtOAc (50 ml). Washed with water (3×40 ml) and dried over MgSO4. Evaporated off the solvent and crystallised from ethanol to yield the title compound as 110 mg of white solid. δH (400 MHz, d6-DMSO) 1.10 (3H, t), 1.42 (3H, t), 2.90 (2H, t), 4.02 (2H, q), 4.27 (2H, q), 4.49 (2H, t), 7.40 (1H, d), 7.74 (1H, s), 7.80 (1H, d), 7.95 (1H, dd), 8.16 (1H, dd), 8.21-8.22 (2H, m). MS (ES) C23H2135Cl2N3O4 requires 473; found 474 (MH+).

Workup

temperatureCooled mixture
washWashed with water (3×40 ml)
dry with materialdried over MgSO4
customEvaporated off the solvent
customcrystallised from ethanol

Sources & evidence

ORD record: ord-7e7a437694fe40fcb220802b4a1cdcae
Source dataset: uspto-grants-2012_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08101775B2

Reaction notes

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