Triphenylphosphine → HCID 58505712, compound

HRID 1917602Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([C:10]2[N:18]3[C:13]([CH:14]=[C:15]([OH:19])[CH:16]=[CH:17]3)=[C:12]([C:20](=[O:25])[C:21]([CH3:24])([CH3:23])[CH3:22])[C:11]=2[CH2:26][C:27]([CH3:34])([CH3:33])[C:28]([O:30][CH2:31][CH3:32])=[O:29])=[O:9])=[CH:4][CH:3]=1.[CH3:35][O:36][C:37]1[N:42]=[C:41]([CH2:43]O)[CH:40]=[CH:39][CH:38]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]([C:10]2[N:18]3[C:13]([CH:14]=[C:15]([O:19][CH2:43][C:41]4[CH:40]=[CH:39][CH:38]=[C:37]([O:36][CH3:35])[N:42]=4)[CH:16]=[CH:17]3)=[C:12]([C:20](=[O:25])[C:21]([CH3:23])([CH3:24])[CH3:22])[C:11]=2[CH2:26][C:27]([CH3:33])([CH3:34])[C:28]([O:30][CH2:31][CH3:32])=[O:29])=[O:9])=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 23 °C

Procedure

To a cold (0° C.) solution of ethyl 3-{3-[(4-chlorophenyl)carbonyl]-1-(2,2-dimethylpropanoyl)-7-hydroxyindolizin-2-yl}-2,2-dimethylpropanoate (100 mg, 0.21 mmol), (6-methoxy-pyridin-2-yl)-methanol (35 mg, 0.25 mmol), and triphenylphosphine (65 mg, 0.25 mmol) in THF (5 mL) is added DIAD (48 μL, 0.25 mmol). The reaction is allowed to gradually warm to 23° C. and then stirred overnight. Silica gel is added and the mixture is concentrated in vacuo then purified by flash chromatography (SiO2, hexanes to 15% EtOAc in hexanes) to give ethyl 3-{3-[(4-chlorophenyl)carbonyl]-1-(2,2-dimethylpropanoyl)-7-[(6-methoxypyridin-2-yl)methoxy]indolizin-2-yl}-2,2-dimethylpropanoate (20 mg, 16%).

Workup

additionSilica gel is added
concentrationthe mixture is concentrated in vacuo
customthen purified by flash chromatography (SiO2, hexanes to 15% EtOAc in hexanes)

Sources & evidence

ORD record: ord-0dfff31ea4be4c95b9d3fb11e5b6018d
Source dataset: uspto-grants-2013_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08618300B2

Reaction notes

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