Triethylamine → Cis-4-Benzyloxycarbonylamino-3-[4-(2-oxo-2H-pyridin-1-yl)-benzoylamino]-piperidine-1-carboxylic acid tert-butyl ester

HRID 1271722Notes

Reaction equation

HRID 1271722 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C@H:11]([NH:14][C:15]([O:17][CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[O:16])[C@H:10]([NH2:25])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.[O:33]=[C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][N:35]1[C:40]1[CH:48]=[CH:47][C:43]([C:44](Cl)=[O:45])=[CH:42][CH:41]=1>C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C@H:11]([NH:14][C:15]([O:17][CH2:18][C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=2)=[O:16])[C@H:10]([NH:25][C:44](=[O:45])[C:43]2[CH:42]=[CH:41][C:40]([N:35]3[CH:36]=[CH:37][CH:38]=[CH:39][C:34]3=[O:33])=[CH:48][CH:47]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 222404154-(2-oxopyridin-1(2H)-yl)benzoyl chlorideHCID 69440349tert-Butyl (3R,4S)-3-amino-4-{[(benzyloxy)carbonyl]amino}piperidine-1-carboxylate

Product 1

HCID 69437112Cis-4-Benzyloxycarbonylamino-3-[4-(2-oxo-2H-pyridin-1-yl)-benzoylamino]-piperidine-1-carboxylic acid tert-butyl esterYield 66.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

Cis-3-amino-4-benzyloxycarbonylamino-piperidine-1-carboxylic acid tert-butyl ester (332.1 mg, 0.95 mmol), from Example 112 Part F, was mixed with 10 mL of CH2Cl2 and 96 mg (0.95 mmol) of triethylamine. The resulting solution was cooled with an ice-water bath. Freshly prepared 4-(2-oxopyridin-1(2H)-yl)benzoyl chloride (222 mg, 0.95 mmol), from part A, was added portion wise. Stirring was continued at rt overnight. CH2Cl2 (10 mL) was added, and the solution was washed with water (3×3 mL). The organic phase was dried over MgSO4, filtered, and evaporated to yield cis-4-Benzyloxycarbonylamino-3-[4-(2-oxo-2H-pyridin-1-yl)-benzoylamino]-piperidine-1-carboxylic acid tert-butyl ester (343.2 mg) as a crude oil, which was further purified by flash chromatography (ISCO system; 10 g cartridge Eluent AcOEt/Hexane 20%). 1H NMR (400 MHz, CDCl3) δ 7.83 (d, J=8.4 Hz, 2H), 7.42–7.24 (m, 8H), 7.06 (d, J=6.5 Hz, 1H), 6.62 (d, J=9.1 Hz, 1H), 6.27 (t, 1H), 5.06 (s, 2H), 4.34 (bs, 1H), 4.08 (bs, 1H), 3.87 (m, 1H), 3.16 (d, J=13.4 Hz, 1H), 2.98 (t, 1H), 1.85 (bs, 1H), 1.65 (m, 1H), 1.39 (m, 9H), ppm. LC-MS (ESI) 569.24 [M+Na]+, tR=6.331 min (Shimadzu Phenomenex S5 ODS 4.6 ×50 mm Luna flow rate 2.5 mL/mn; detection at 220 nM; Gradient elution 0% to 100% B over 8 min; (A=10% MeOH, 90% H2O, 0.2% H3PO4& B=90% MeOH, 10% H2O, 0.2% H3PO4)).

Workup

  1. temperatureThe resulting solution was cooled with an ice-water bath
  2. washthe solution was washed with water (3×3 mL)
  3. dry with materialThe organic phase was dried over MgSO4
  4. filtrationfiltered
  5. customevaporated

Sources & evidence

ORD record
ord-e52f597ec6fb46f4819fe1de35abcf30
Source dataset
uspto-grants-2007_04
Patent number
US07205318B2

Reaction notes

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