Hydrochloric Acid → 1-(alpha-methylbenzyl)-3-(2-(4-(1-(2-ethoxyethyl)-1H-benzimidazol-2-yl-amino)piperidin-1-yl)ethyl)-3-phenylpyrrolidine

HRID 323441Notes

Reaction equation

HRID 323441 reaction equation
[C:1]([C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1)(=O)[CH3:2].Cl.[CH2:11]([O:13][CH2:14][CH2:15][N:16]1[C:20]2[CH:21]=[CH:22][CH:23]=[CH:24][C:19]=2[N:18]=[C:17]1[NH:25][CH:26]1[CH2:31][CH2:30][N:29]([CH2:32][CH2:33][C:34]2([C:39]3[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=3)[CH2:38][CH2:37][NH:36][CH2:35]2)[CH2:28][CH2:27]1)[CH3:12].C([BH3-])#N.[Na+].Cl>CO.BrCOC1C(O)=CC=C(C)C=1.C(OCC)(=O)C>[CH3:2][CH:1]([N:36]1[CH2:37][CH2:38][C:34]([CH2:33][CH2:32][N:29]2[CH2:30][CH2:31][CH:26]([NH:25][C:17]3[N:16]([CH2:15][CH2:14][O:13][CH2:11][CH3:12])[C:20]4[CH:21]=[CH:22][CH:23]=[CH:24][C:19]=4[N:18]=3)[CH2:27][CH2:28]2)([C:39]2[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=2)[CH2:35]1)[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 7410AcetophenoneHCID 5003444Sodium cyanoborohydrideHCID 220090993-(2-(4-(1-(2-ethoxyethyl)-1H-benzimidazol-2-yl-amino)piperidin-1-yl)ethyl)-3-phenylpyrrolidine hydrochloric acid salt

Product 1

HCID 178956821-(alpha-methylbenzyl)-3-(2-(4-(1-(2-ethoxyethyl)-1H-benzimidazol-2-yl-amino)piperidin-1-yl)ethyl)-3-phenylpyrrolidine

Reagents, catalysts & solvents 3

HCID 86612474HCID 86612474, compoundCatalystHCID 887MethanolSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

According to the method of J. Am. Chem. Soc., 93, 2897 (1971), combine acetophenone (10 mmol) and 3-(2-(4-(1-(2-ethoxyethyl)-1H-benzimidazol-2-yl-amino)piperidin-1-yl)ethyl)-3-phenylpyrrolidine hydrochloric acid salt (prepared from (−)-3-phenyl-3-(2-hydroxyethyl)pyrrolidine (R,R)-di-p-anisoyltartaric acid salt) (10 mmol) in methanol (100 mL). Add bromocreosol green (0.5% by weight in methanol, 1 drop). Add dropwise, a solution of sodium cyanoborohydride (10 mL, 1M in tetrahydrofuran, 10 mmol) and at the same time maintain the pH of the reaction mixture, as indicated by a yellow color for the indicator, by the addition of a 5 M solution of hydrochloric acid in methanol. When the reaction is complete, concentrate the reaction mixture in vacuo to obtain a residue. Dilute the residue with ethyl acetate and extract with water. Separate the layers, dry the organic layer over MgSO4, filter, and evaporate in vacuo to give the title compound.

Workup

  1. additionAdd dropwise
  2. concentrationconcentrate the reaction mixture in vacuo
  3. customto obtain a residue
  4. extractionextract with water
  5. customSeparate the layers
  6. dry with materialdry the organic layer over MgSO4
  7. filtrationfilter
  8. customevaporate in vacuo

Sources & evidence

ORD record
ord-394e22d4ba0b463b95ef6450faf46722
Source dataset
uspto-grants-2001_04
Patent number
US06211199B1

Reaction notes

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