Triethylamine → trans(+/-)-Benzyl 3-(bis(tert-butoxycarbonyl)amino)-4-hydroxypiperidine-1-carboxylate

HRID 73522Notes

Reaction equation

HRID 73522 reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]1[C@H:14]([OH:15])[CH2:13][CH2:12][N:11]([C:16]([O:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[O:17])[CH2:10]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[O:26](C(OC(C)(C)C)=O)[C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=O.C(N(CC)CC)C>C(Cl)Cl.CC#N.CN(C1C=CN=CC=1)C>[C:1]([O:5][C:6]([N:8]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:26])[C@H:9]1[C@H:14]([OH:15])[CH2:13][CH2:12][N:11]([C:16]([O:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[O:17])[CH2:10]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 90495Di-tert-butyl dicarbonateHCID 53487823Benzyl (3R,4R)-3-(tert-butoxycarbonylamino)-4-hydroxypiperidine-1-carboxylate

Product 1

HCID 131729680trans(+/-)-Benzyl 3-(bis(tert-butoxycarbonyl)amino)-4-hydroxypiperidine-1-carboxylate

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6342AcetonitrileSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of trans (+/−)-benzyl 3-(tert-butoxycarbonylamino)-4-hydroxypiperidine-1-carboxylate (1.0 equiv.) in DCM and CH3CN (1:1, 0.14 M) was added BOC2O (1.0 equiv.), triethylamine (1.5 equiv.), and DMAP (catalytic amount). The reaction was stirred at room temperature for 15 h, upon which time the solution was concentrated and purified via silica gel column chromatography eluting with EtOAc and hexanes (1:6) to give the desired product as a white foam. LCMS (m/z): 451.1 (MH+).

Workup

  1. concentrationwas concentrated
  2. custompurified via silica gel column chromatography
  3. washeluting with EtOAc and hexanes (1:6)

Sources & evidence

ORD record
ord-3db9196d8f9649a7a5062afe34a717b4
Source dataset
uspto-grants-2014_09
Patent number
US08829193B2

Reaction notes

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