Cyanomethylenetributylphosphorane → methyl 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-(N,1-dimethylcyclopropanesulfonamido)butan-2-yl)-3-methyl-2-oxopiperidin-3-yl)acetate

HRID 932139Notes

Reaction equation

HRID 932139 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=3)[N:12]([C@@H:21]([CH2:31][CH3:32])[CH2:22][NH:23][S:24]([C:27]3([CH3:30])[CH2:29][CH2:28]3)(=[O:26])=[O:25])[C:11](=[O:33])[C@:10]([CH2:35][C:36]([O:38][CH3:39])=[O:37])([CH3:34])[CH2:9]2)[CH:5]=[CH:6][CH:7]=1.[CH2:40](P(CCCC)(CCCC)=CC#N)CCC>CO.C1(C)C=CC=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:15]=[CH:16][C:17]([Cl:20])=[CH:18][CH:19]=3)[N:12]([C@@H:21]([CH2:31][CH3:32])[CH2:22][N:23]([CH3:40])[S:24]([C:27]3([CH3:30])[CH2:28][CH2:29]3)(=[O:26])=[O:25])[C:11](=[O:33])[C@:10]([CH2:35][C:36]([O:38][CH3:39])=[O:37])([CH3:34])[CH2:9]2)[CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 2

HCID 4622928CyanomethylenetributylphosphoraneHCID 67999074HCID 67999074, compound

Product 1

HCID 67999543methyl 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-(N,1-dimethylcyclopropanesulfonamido)butan-2-yl)-3-methyl-2-oxopiperidin-3-yl)acetate

Reagents, catalysts & solvents 2

HCID 887MethanolCatalystHCID 1140TolueneSolvent

Procedure

A solution of methyl 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-1-((S)-1-(1-methylcyclopropanesulfonamido)butan-2-yl)-2-oxopiperidin-3-yl)acetate (21.7 mg, 0.036 mmol; Example 193), 2-(tributylphosphoranylidene)acetonitrile (8.8 mg, 0.036 mmol) and one drop of MeOH in toluene (0.5 mL) was stirred at 110° C. for 1 h. Flash column purification on silica gel (0 to 60% EtOAc in hexanes) gave methyl 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-(N,1-dimethylcyclopropanesulfonamido)butan-2-yl)-3-methyl-2-oxopiperidin-3-yl)acetate. This was hydrolyzed with LiOH (1N solution in water, 0.3 mL) in ethanol (0.5 mL) for 3 h at rt. HPLC purification (C18 column, eluted with 10 to 95% CH3CN in water, with 0.1% TFA) gave the title compound.

Workup

  1. customFlash column purification on silica gel (0 to 60% EtOAc in hexanes)

Sources & evidence

ORD record
ord-b52d3367558f4c20b1e4510ac333bd37
Source dataset
uspto-grants-2016_03
Patent number
US09296736B2

Reaction notes

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