Triethylamine → tert-Butyl [(1R,3S)-3-isopropyl-3-({4-[4-(trifluoromethyl)pyrimidin-2-yl]piperazin-1-yl}carbonyl)cyclopentyl]carbamate

HRID 1044598Notes

Reaction equation

HRID 1044598 reaction equation
[N:1]1([C:7]2[N:12]=[C:11]([C:13]([F:16])([F:15])[F:14])[CH:10]=[CH:9][N:8]=2)[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1.[C:17]([O:21][C:22]([NH:24][C@@H:25]1[CH2:29][CH2:28][C@:27]([CH:33]([CH3:35])[CH3:34])([C:30](O)=[O:31])[CH2:26]1)=[O:23])([CH3:20])([CH3:19])[CH3:18].C(N(CC)CC)C.F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1>C(Cl)Cl>[C:17]([O:21][C:22](=[O:23])[NH:24][C@@H:25]1[CH2:29][CH2:28][C@:27]([CH:33]([CH3:34])[CH3:35])([C:30]([N:4]2[CH2:5][CH2:6][N:1]([C:7]3[N:12]=[C:11]([C:13]([F:14])([F:16])[F:15])[CH:10]=[CH:9][N:8]=3)[CH2:2][CH2:3]2)=[O:31])[CH2:26]1)([CH3:20])([CH3:19])[CH3:18]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 27783342-(Piperazin-1-yl)-4-(trifluoromethyl)pyrimidineHCID 60122293(1S,3R)-3-((Tert-butoxycarbonyl)amino)-1-isopropylcyclopentanecarboxylic acid

Product 1

HCID 59833584tert-Butyl [(1R,3S)-3-isopropyl-3-({4-[4-(trifluoromethyl)pyrimidin-2-yl]piperazin-1-yl}carbonyl)cyclopentyl]carbamateYield 55.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 2-piperazin-1-yl-4-(trifluoromethyl)pyrimidine (250 mg, 1.08 mmol), (1S,3R)-3-[(tert-butoxycarbonyl)amino]-1-isopropylcyclopentanecarboxylic acid (300 mg, 1.1 mmol) and triethylamine (0.45 mL, 3.2 mmol) in methylene chloride (10 mL) was added benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (520 mg, 1.2 mmol). After being stirred overnight, the reaction was quenched with saturated NaHCO3. The resulting solution was extracted with EtOAc three times. The combined organic layers were dried (MgSO4) and concentrated. Purification by column chromatography on silica gel (20%-40% EtOAc/hexanes) provided 290 mg of desired product MS calculated for C23H34F3N5O3: (M+H) 486; found 386.1 (M-Boc+1).

Workup

  1. customthe reaction was quenched with saturated NaHCO3
  2. extractionThe resulting solution was extracted with EtOAc three times
  3. dry with materialThe combined organic layers were dried (MgSO4)
  4. concentrationconcentrated
  5. customPurification by column chromatography on silica gel (20%-40% EtOAc/hexanes)

Sources & evidence

ORD record
ord-8fa220bb31a644c9b46c676f5bbf5fb5
Source dataset
uspto-grants-2013_10
Patent number
US08563582B2

Reaction notes

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