Ethyl 3-(3-(tert-butylthio)-5-hydroxy-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl)-1H-indol-2-yl)-2,2-dimethylpropanoate → 3-[5-Hydroxy-3-(2-methyl-2-propylthio)-1-[4-(2-methoxypyrid-5-yl)benzyl]indol-2-yl]-2,2-dimethylpropionic acid ethyl ester

HRID 2366096Notes

Reaction equation

HRID 2366096 reaction equation
C1[N:5]([C@@H:6]2[O:10][C@@H:9]3COP(O)(O[C@H]3[C@H:7]2O)=O)[C:4]2NC(N)=N[C:21](=O)[C:3]=2N=1.[C:24]([S:28][C:29]1[C:37]2[C:32](=[CH:33][CH:34]=[C:35]([OH:38])[CH:36]=2)[N:31]([CH2:39][C:40]2[CH:45]=[CH:44][C:43](B3OC(C)(C)C(C)(C)O3)=[CH:42][CH:41]=2)[C:30]=1[CH2:55][C:56]([CH3:63])([CH3:62])[C:57]([O:59][CH2:60][CH3:61])=[O:58])([CH3:27])([CH3:26])[CH3:25]>>[CH2:60]([O:59][C:57](=[O:58])[C:56]([CH3:62])([CH3:63])[CH2:55][C:30]1[N:31]([CH2:39][C:40]2[CH:41]=[CH:42][C:43]([C:3]3[CH:21]=[CH:7][C:6]([O:10][CH3:9])=[N:5][CH:4]=3)=[CH:44][CH:45]=2)[C:32]2[C:37]([C:29]=1[S:28][C:24]([CH3:26])([CH3:27])[CH3:25])=[CH:36][C:35]([OH:38])=[CH:34][CH:33]=2)[CH3:61]

Participants

3

Reactant 2

HCID 44474908Ethyl 3-(3-(tert-butylthio)-5-hydroxy-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl)-1H-indol-2-yl)-2,2-dimethylpropanoate2×HCID 178418274HCID 178418274, compound

Product 1

HCID 592488773-[5-Hydroxy-3-(2-methyl-2-propylthio)-1-[4-(2-methoxypyrid-5-yl)benzyl]indol-2-yl]-2,2-dimethylpropionic acid ethyl esterYield 86%

Procedure

The cGMP starting material used for the process was ethyl 3-(3-(tert-butylthio)-5-hydroxy-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl)-1H-indol-2-yl)-2,2-dimethylpropionate from Example 3. Ethyl 3-(3-(tert-butylthio)-5-hydroxy-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl)-1H-indol-2-yl)-2,2-dimethylpropionate from Example 3, was scaled up to 2.0 kg. In order to ensure optimal Suzuki coupling conditions, the amount of time needed to deoxygenate the mixture was increased from about 5-10 minutes to about 30-45 minutes. Workup and isolation of the product proceeded as described above to yield 1.49 kg of 3-[5-hydroxy-3-(2-methyl-2-propylthio)-1-[4-(2-methoxypyrid-5-yl)benzyl]indol-2-yl]-2,2-dimethylpropionic acid ethyl ester in about 86% yield.

Workup

  1. customto deoxygenate the mixture
  2. temperaturewas increased from about 5-10 minutes to about 30-45 minutes

Sources & evidence

ORD record
ord-b7a1609a15184eb5a116529b24bdb639
Source dataset
uspto-grants-2014_04
Patent number
US08697730B2

Reaction notes

Loading…