Potassium Phosphate, Tribasic → (R/S) 4-(4-morpholinocyclohex-1-enyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-3-carbaldehyde

HRID 2271412Notes

Reaction equation

CC1(C)C(C)(C)OB([C:9]2[CH2:14][CH2:13][CH:12]([N:15]3[CH2:20][CH2:19][O:18][CH2:17][CH2:16]3)[CH2:11][CH:10]=2)O1.I[C:23]1[C:24]([CH:34]=[O:35])=[N:25][N:26]([CH:28]2[CH2:33][CH2:32][CH2:31][CH2:30][O:29]2)[CH:27]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>COCCOC.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[O:18]1[CH2:17][CH2:16][N:15]([CH:12]2[CH2:13][CH2:14][C:9]([C:23]3[C:24]([CH:34]=[O:35])=[N:25][N:26]([CH:28]4[CH2:33][CH2:32][CH2:31][CH2:30][O:29]4)[CH:27]=3)=[CH:10][CH2:11]2)[CH2:20][CH2:19]1

Participants

Conditions

Temperature: 85 °C

Procedure

A mixture of 4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)cyclohex-3-enyl)morpholine (293 mg, 1.00 mmol, 1.00 equiv), (R/S) 4-iodo-1-(oxan-2-yl)-1H-pyrazole-3-carbaldehyde (306 mg, 1.00 mmol, 1.00 equiv), K3PO4 (640 mg, 3.02 mmol, 3.02 equiv) and Pd(dppf)Cl2 (65.1 mg, 0.10 mmol, 0.10 equiv) in ethylene glycol dimethyl ether (5 mL) was stirred under nitrogen at 85° C. for 12 h. The reaction was cooled to room temperature and concentrated under vacuum. The residue was purified on a silica gel column eluted with 50-100% of ethyl acetate in petroleum ether to give 280 mg (81%) of (R/S) 4-(4-morpholinocyclohex-1-enyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-3-carbaldehyde as a brown oil. LCMS (method C, ESI): RT=0.70 min, m/z=346.2 [M+H]+.

Workup

temperatureThe reaction was cooled to room temperature
concentrationconcentrated under vacuum
customThe residue was purified on a silica gel column
washeluted with 50-100% of ethyl acetate in petroleum ether

Sources & evidence

ORD record: ord-8e722e4bf2ec4ca885d167e2c19fd7ff
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09120757B2

Reaction notes

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