Triphosgene → (5R)-5-methyl-3-(6-{[4-methyl-3-(methyloxy)phenyl]oxy}-3-pyridinyl)-2,4-imidazolidinedione

HRID 1505409Notes

Reaction equation

[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][C:9]2[N:14]=[CH:13][C:12]([NH:15][C:16](=[O:20])[C@@H:17]([CH3:19])[NH2:18])=[CH:11][CH:10]=2)=[CH:4][C:3]=1[O:21][CH3:22].Cl[C:24](Cl)([O:26]C(=O)OC(Cl)(Cl)Cl)Cl>ClCCl>[CH3:19][C@H:17]1[NH:18][C:24](=[O:26])[N:15]([C:12]2[CH:13]=[N:14][C:9]([O:8][C:5]3[CH:6]=[CH:7][C:2]([CH3:1])=[C:3]([O:21][CH3:22])[CH:4]=3)=[CH:10][CH:11]=2)[C:16]1=[O:20]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of N1-(6-{[4-methyl-3-(methyloxy)phenyl]oxy}-3-pyridinyl)-D-alaninamide (Intermediate 52, 255 mg) in dry dichloromethane (15 mL), TEA (0.590 mL, 4.23 mmol) was added and the reaction mixture was cooled to 0° C. A solution of triphosgene (113 mg, 0.381 mmol) in dry dichloromethane (DCM) (5 mL) was slowly added and the reaction mixture was stirred for 30 minutes at the same temperature. The reaction was quenched with water (10 mL) and extracted with dichloromethane (20 mL). The organic layer was dried over sodium sulphate, filtered and evaporated and the residue was purified by silica gel chromatography (Biotage system, 10 g SNAP column) using as eluent a gradient cyclohexane/ethyl acetate from 70/30 to 30/70. This afforded the title compound as a white solid (172 mg, 0.525 mmol).

Workup

customThe reaction was quenched with water (10 mL)
extractionextracted with dichloromethane (20 mL)
dry with materialThe organic layer was dried over sodium sulphate
filtrationfiltered
customevaporated
customthe residue was purified by silica gel chromatography (Biotage system, 10 g SNAP column)

Sources & evidence

ORD record: ord-0374f53dc9d1412298b1411366529123
Source dataset: uspto-grants-2015_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09216967B2

Reaction notes

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