Triethylamine → HCID 69748793, compound

HRID 497450Notes

Reaction equation

HRID 497450 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]([C:25](O)=[O:26])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].F[P-](F)(F)(F)(F)F.N1(O[P+](N2CCCC2)(N2CCCC2)N2CCCC2)C2C=CC=CC=2N=N1.C(N(CC)CC)C.[F:68][C:69]1[CH:81]=[CH:80][C:72]([CH2:73][C@@H:74]2[CH2:79][CH2:78][CH2:77][NH:76][CH2:75]2)=[CH:71][CH:70]=1>ClCCl>[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]([C:25]([N:76]2[CH2:77][CH2:78][CH2:79][C@@H:74]([CH2:73][C:72]3[CH:71]=[CH:70][C:69]([F:68])=[CH:81][CH:80]=3)[CH2:75]2)=[O:26])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 2724699PyBOPHCID 12174831(S)-3-(4-Fluorobenzyl)piperidineHCID 58766970(3R,4R)-4-benzyloxycarbonylamino-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester

Product 1

HCID 69748793HCID 69748793, compoundYield 83.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

In a flask (3R,4R)-4-benzyloxycarbonylamino-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester (3.93 g, 10.4 mmol) was dissolved in dichloromethane (200 mL) and then benzotriazol-1-yloxy-tripyrrolidinophosphonium hexafluorophosphate (6.48 g, 12.5 mmol) and triethylamine (3.3 mL, 23.7 mmol) were added. After stirring for 5 minutes, (S)-3-(4-fluorobenzyl)-piperidine (2.21 g, 11.4 mmol) was added. The mixture was stirred for 16 hours. The reaction mixture was extracted with water (50 mL) and brine (50 mL). The organic layer was dried with magnesium sulfate, filtered, and concentrated in vacuo to give a crude orange glass (10.49 g). Purification by flash column chromatography (50-70% ethyl acetate/hexanes) provided a colorless oil (4.79 g, 83%). 1H NMR (300 MHz, CDCl3), δ: 7.32 (m, 2H), 7.26 (m, 3H), 7.07 (m, 2H), 6.95 (m, 2H), 5.04 (m, 2H), 4.41 (d, 1H, J=13), 4.12 (bm, 2H), 3.83 (bm, 2H), 3.06 (bm, 1H), 2.76 (bs, 2H), 2.60 (dd, 2H, J=14, J′=6), 2.37 (m, 2H), 1.90 (bs, 1H), 1.63 (bm, 2H), 1.45 (m, 9H), 1.12 (m, 3H), 0.87 (m, 1H).

Workup

  1. stirringThe mixture was stirred for 16 hours
  2. extractionThe reaction mixture was extracted with water (50 mL) and brine (50 mL)
  3. dry with materialThe organic layer was dried with magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customto give a crude orange glass (10.49 g)
  7. customPurification by flash column chromatography (50-70% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-bb57bd7aa72d41e098f328a61ba16332
Source dataset
uspto-grants-2005_09
Patent number
US06949546B2

Reaction notes

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