1,8-Diazabicyclo(5.4.0)undec-7-ene → tert-butyl 4-(3-cyano-2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)propyl)piperidine-1-carboxylate

HRID 1876842Notes

Reaction equation

HRID 1876842 reaction equation
[CH3:1][C:2]1([CH3:14])[C:6]([CH3:8])([CH3:7])[O:5][B:4]([C:9]2[CH:10]=[N:11][NH:12][CH:13]=2)[O:3]1.[C:15]([CH:17]=[CH:18][CH2:19][CH:20]1[CH2:25][CH2:24][N:23]([C:26]([O:28][C:29]([CH3:32])([CH3:31])[CH3:30])=[O:27])[CH2:22][CH2:21]1)#[N:16].N12CCCN=C1CCCCC2>C(#N)C>[C:15]([CH2:17][CH:18]([N:12]1[CH:13]=[C:9]([B:4]2[O:5][C:6]([CH3:7])([CH3:8])[C:2]([CH3:14])([CH3:1])[O:3]2)[CH:10]=[N:11]1)[CH2:19][CH:20]1[CH2:21][CH2:22][N:23]([C:26]([O:28][C:29]([CH3:32])([CH3:31])[CH3:30])=[O:27])[CH2:24][CH2:25]1)#[N:16]

Participants

5

Reactant 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 27740104-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 67155885Tert-butyl 4-(3-cyanoprop-2-en-1-yl)piperidine-1-carboxylate

Product 1

HCID 68753948tert-butyl 4-(3-cyano-2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)propyl)piperidine-1-carboxylateYield 80.1%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (1.28 g, 6.60 mmol) in acetonitrile (33.0 mL) was added tert-butyl 4-(3-cyanoprop-2-en-1-yl)piperidine-1-carboxylate (3.30 g, 13.2 mmol), followed by 1,8-diazabicyclo[5.4.0]undec-7-ene (0.987 mL, 6.60 mmol). The resulting mixture was stirred at room temperature overnight. After evaporating the reaction mixture to dryness, the residue was purified on silica gel, eluting with 0-50% EtOAc in hexanes, to give the desired product (2.35 g, 80%). LCMS (M+H) 445.2

Workup

  1. customAfter evaporating the reaction mixture to dryness
  2. customthe residue was purified on silica gel
  3. washeluting with 0-50% EtOAc in hexanes

Sources & evidence

ORD record
ord-46b2a271547240149fc63690b97007de
Source dataset
uspto-grants-2012_11
Patent number
US08309718B2

Reaction notes

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