Triphosgene → QZ8Etv7qyu

HRID 527712Notes

Reaction equation

[NH2:1][C@H:2]([CH2:25][CH3:26])[C:3]([NH:5][C:6]1[CH:7]=[N:8][C:9]([O:12][C:13]2[C:18]3[C:19]4([CH2:22][O:23][C:17]=3[C:16]([CH3:24])=[CH:15][CH:14]=2)[CH2:21][CH2:20]4)=[CH:10][CH:11]=1)=[O:4].Cl[C:28](Cl)([O:30]C(=O)OC(Cl)(Cl)Cl)Cl>C(Cl)Cl>[CH2:25]([C@H:2]1[NH:1][C:28](=[O:30])[N:5]([C:6]2[CH:7]=[N:8][C:9]([O:12][C:13]3[C:18]4[C:19]5([CH2:22][O:23][C:17]=4[C:16]([CH3:24])=[CH:15][CH:14]=3)[CH2:21][CH2:20]5)=[CH:10][CH:11]=2)[C:3]1=[O:4])[CH3:26]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of (2R)-2-amino-N-[6-(7-methylspiro[2H-benzofuran-3,1′-cyclopropane]-4-yl)oxy-3-pyridyl]butanamide (Intermediate 160, 40 mg, 0.11 mmol) in dry DCM (5 ml) TEA (0.042 ml, 0.3 mmol) was added and the reaction mixture was cooled to 0° C. A solution of triphosgene (23.7 mg, 0.08 mmol) in dry DCM (3 ml) was slowly added and the reaction mixture was stirred for 15 minutes at the same temperature. The reaction was quenched with water (10 ml) and two phases were separated. The organic layer was dried (Na2SO4), filtered and evaporated and the residue was purified by flash chromatography (Biotage system) on silica gel using a 10 g SNAP column and cyclohexane/ethyl acetate 75:25 to cyclohexane/ethyl acetate 25:75 as eluents affording the title compound (22 mg) as a white solid.

Workup

customThe reaction was quenched with water (10 ml) and two phases
customwere separated
dry with materialThe organic layer was dried (Na2SO4)
filtrationfiltered
customevaporated
customthe residue was purified by flash chromatography (Biotage system) on silica gel using a 10 g SNAP column and cyclohexane/ethyl acetate 75:25 to cyclohexane/ethyl acetate 25:75 as eluents

Sources & evidence

ORD record: ord-2a492352328b47f38c1a3ff93e4a0651
Source dataset: uspto-grants-2016_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09346790B2

Reaction notes

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