(S)-4-((4-Chloro-3-methoxypyridin-2-yl)methyl)-7-cyano-1,2,3,4-tetrahydrocyclopenta[b]indol-2-ylcarbamic acid isopropyl ester → (S)-4-((3-Methoxypyridin-2-yl)methyl)-7-cyano-1,2,3,4-tetrahydrocyclopenta[b]indol-2-ylcarbamic acid isopropyl ester

HRID 449839Notes

Reaction equation

HRID 449839 reaction equation
Cl[C:2]1[CH:7]=[CH:6][N:5]=[C:4]([CH2:8][N:9]2[C:17]3[CH:16]=[CH:15][C:14]([C:18]#[N:19])=[CH:13][C:12]=3[C:11]3[CH2:20][C@H:21]([NH:23][C:24](=[O:29])[O:25][CH:26]([CH3:28])[CH3:27])[CH2:22][C:10]2=3)[C:3]=1[O:30][CH3:31]>[Pd].CO.O>[CH:26]([O:25][C:24](=[O:29])[NH:23][C@@H:21]1[CH2:22][C:10]2[N:9]([CH2:8][C:4]3[C:3]([O:30][CH3:31])=[CH:2][CH:7]=[CH:6][N:5]=3)[C:17]3[CH:16]=[CH:15][C:14]([C:18]#[N:19])=[CH:13][C:12]=3[C:11]=2[CH2:20]1)([CH3:28])[CH3:27]

Participants

5

Reactant 1

HCID 66933264(S)-4-((4-Chloro-3-methoxypyridin-2-yl)methyl)-7-cyano-1,2,3,4-tetrahydrocyclopenta[b]indol-2-ylcarbamic acid isopropyl ester

Product 1

HCID 66933193(S)-4-((3-Methoxypyridin-2-yl)methyl)-7-cyano-1,2,3,4-tetrahydrocyclopenta[b]indol-2-ylcarbamic acid isopropyl esterYield 94%

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalyst2×HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

A mixture of (S)-isopropyl 4-((4-chloro-3-methoxypyridin-2-yl)methyl)-7-cyano-1,2,3,4-tetrahydrocyclopenta[b]indol-2-ylcarbamate (12.53 g, 28.55 mmol) and 10% palladium on carbon (1.00 g) in methanol (150 mL) is hydrogenated at 50 psi at room temperature overnight. A fresh batch of 10% palladium on carbon (1.2 g) is slurried in water (˜2 mL) and added to the reaction mixture, which is hydrogenated (50 psi) at room temperature overnight. The catalyst is filtered off and the solution is concentrated under reduced pressure to obtain a pale yellow solid. The solid is triturated with ether twice and dried under high vacuum to afford a yellow solid (10.80 g, 94%). LC-ES/MS m/z 405.2 [M+H]+

Workup

  1. additionadded to the reaction mixture, which
  2. customat room temperature
  3. customovernight
  4. filtrationThe catalyst is filtered off
  5. concentrationthe solution is concentrated under reduced pressure
  6. customto obtain a pale yellow solid
  7. customThe solid is triturated with ether twice
  8. customdried under high vacuum

Sources & evidence

ORD record
ord-6b96c004a33e4400bf50a82ed9b59c14
Source dataset
uspto-grants-2013_07
Patent number
US08486943B2

Reaction notes

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