Cesium carbonate → 4-[(2S,3S)-3-(tert-butyldimethylsilyloxy)-2-ethyl-5-oxopyrrolidin-1-yl]-2-chlorobenzonitrile

HRID 1967294Notes

Reaction equation

HRID 1967294 reaction equation
[Si:1]([O:8][C@@H:9]1[C@H:13]([CH2:14][CH3:15])[NH:12][C:11](=[O:16])[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].Br[C:18]1[CH:25]=[CH:24][C:21]([C:22]#[N:23])=[C:20]([Cl:26])[CH:19]=1.C(=O)([O-])[O-].[Cs+].[Cs+].C1(P(C2C=CC=CC=2)C2C3OC4C(=CC=CC=4P(C4C=CC=CC=4)C4C=CC=CC=4)C(C)(C)C=3C=CC=2)C=CC=CC=1>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[Si:1]([O:8][C@H:9]1[CH2:10][C:11](=[O:16])[N:12]([C:18]2[CH:25]=[CH:24][C:21]([C:22]#[N:23])=[C:20]([Cl:26])[CH:19]=2)[C@H:13]1[CH2:14][CH3:15])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

Participants

6

Reactant 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 70104204-Bromo-2-chlorobenzonitrileHCID 67105254(4S,5S)-4-(tert-butyldimethylsilyloxy)-5-ethylpyrrolidin-2-one

Product 1

HCID 595568834-[(2S,3S)-3-(tert-butyldimethylsilyloxy)-2-ethyl-5-oxopyrrolidin-1-yl]-2-chlorobenzonitrile

Reagents, catalysts & solvents 1

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalyst

Procedure

Using (4S,5S)-4-(tert-butyldimethylsilyloxy)-5-ethylpyrrolidin-2-one (470 mg), 4-bromo-2-chlorobenzonitrile (477 mg), cesium carbonate (944 mg), tris(dibenzylideneacetone)dipalladium(0) (88.5 mg) and 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (224 mg), and in the same manner as in Reference Example 3, the title compound was obtained as a colorless solid (yield: 550 mg, 75%).

Sources & evidence

ORD record
ord-f1151d2984b04db58e5c012584327949
Source dataset
uspto-grants-2013_04
Patent number
US08420694B2

Reaction notes

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