Hydrochloric Acid → (S)-tert-butyl 4-(4-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)-5-hydroxypentanoyl)piperazine-1-carboxylate

HRID 341018Notes

Reaction equation

HRID 341018 reaction equation
[Si]([O:8][CH2:9][C@@H:10]([N:28]([CH3:41])[C:29]([NH:31][CH2:32][C:33]1[CH:38]=[CH:37][CH:36]=[C:35]([F:39])[C:34]=1[Cl:40])=[O:30])[CH2:11][CH2:12][C:13]([N:15]1[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]1)=[O:14])(C(C)(C)C)(C)C.Cl.C([O-])(O)=O.[Na+]>CO>[Cl:40][C:34]1[C:35]([F:39])=[CH:36][CH:37]=[CH:38][C:33]=1[CH2:32][NH:31][C:29](=[O:30])[N:28]([C@H:10]([CH2:9][OH:8])[CH2:11][CH2:12][C:13]([N:15]1[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:25])([CH3:26])[CH3:27])=[O:22])[CH2:17][CH2:16]1)=[O:14])[CH3:41]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 516892Sodium BicarbonateHCID 57947925(S)-tert-butyl 4-(5-(tert-butyldimethylsilyloxy)-4-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)pentanoyl)piperazine-1-carboxylate

Product 1

HCID 57947492(S)-tert-butyl 4-(4-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)-5-hydroxypentanoyl)piperazine-1-carboxylateYield 99.8%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of (S)-tert-butyl 4-(5-(tert-butyldimethylsilyloxy)-4-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)pentanoyl)piperazine-1-carboxylate (4.2 g, 6.8 mmol, 1.0 equiv.) in MeOH (35 mL), was added HCl (2N, 0.68 mL, 1.36 mmol, 0.2 equiv.). The reaction was stirred at RT for 1 h. NaHCO3 (1.1 g, 13.6 mmol, 2.0 equiv) was added to quench the reaction. The solvents were removed. The residue was dissolved in EtOAc (100 mL). The salt was filtered off and the filtrate was concentrated to give (S)-tert-butyl 4-(4-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)-5-hydroxypentanoyl)piperazine-1-carboxylate (3.4 g, quant.). LRMS (M+H+) m/z 501.2.

Workup

  1. customto quench
  2. customthe reaction
  3. customThe solvents were removed
  4. dissolutionThe residue was dissolved in EtOAc (100 mL)
  5. filtrationThe salt was filtered off
  6. concentrationthe filtrate was concentrated

Sources & evidence

ORD record
ord-9c2dd8b544be4a40b40514c2ca140f89
Source dataset
uspto-grants-2014_11
Patent number
US08895582B2

Reaction notes

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