Acetone Cyanohydrin → 4-hydroxy-2-phenethyl-2-phenyl-5-[[2-(trifluoromethyl)phenyl]methyl]-3H-pyran-6-one

HRID 1585424Notes

Reaction equation

HRID 1585424 reaction equation
[OH:1][C:2]1[CH2:7][C:6]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)([CH2:8][CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[O:5][C:4](=[O:22])[CH:3]=1.CCN(CC)CC.[F:30][C:31]([F:42])([F:41])[C:32]1[CH:40]=[CH:39][CH:38]=[CH:37][C:33]=1[C:34](Cl)=O.CC(C)(O)C#N.C([BH3-])#N.[Na+]>C(O)(=O)C.C(#N)C.C(Cl)Cl>[OH:1][C:2]1[CH2:7][C:6]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)([CH2:8][CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[O:5][C:4](=[O:22])[C:3]=1[CH2:34][C:33]1[CH:37]=[CH:38][CH:39]=[CH:40][C:32]=1[C:31]([F:30])([F:41])[F:42]

Participants

9

Reactant 5

HCID 6406Acetone CyanohydrinHCID 8471Triethylamine2×HCID 675612-(Trifluoromethyl)benzoyl chlorideHCID 5003444Sodium cyanoborohydrideHCID 546823015,6-dihydro-4-hydroxy-6-phenyl-6-(2-phenylethyl)-2H-pyran-2-one

Product 1

HCID 547140754-hydroxy-2-phenethyl-2-phenyl-5-[[2-(trifluoromethyl)phenyl]methyl]-3H-pyran-6-one

Reagents, catalysts & solvents 3

HCID 176Acetic AcidSolventHCID 6342AcetonitrileSolventHCID 6344DichloromethaneSolvent

Procedure

The title compound was prepared as described in General Method 8 using the following: 5,6-dihydro-4-hydroxy-6-phenyl-6-(2-phenylethyl)-2H-pyran -2-one (0.300 g, 1.02 mmol), Et3N (0.15 mL, 1.1 mmol), 2-trifluoromethylbenzoyl chloride (0.21 mL, 1.02 mmol), CH2Cl2 (4.0 mL), acetonitrile (4.0 mL), acetone cyanohydrin (0.04 mL, 0.47 mmol), Et3N (0.29 mL, 2.1 mmol), glacial acetic acid (3.0 mL), sodium cyanoborohydride (0.20 g, 3.1 mmol). Purification was achieved by submitting the final residue to column chromatograpy (SiO2, 100% CH2Cl2 to 1% MeOH in CH2Cl2) to provide an oil (0.102 g). 1H NMR (400 MHz, DMSO-d6) δ 11.21 (bs, 1 H), 7.584 (d, 1 H, J=8 Hz), 7.457-7.030 (m, 12 H), 6.179 (d, 1 H, J=7.5 Hz), 3.594 (s, 2 H), 3.362 (d, 1 H, J=17 Hz), 3.249 (d, 1 H, J=17 Hz), 2.686-2.603 (m, 1 H), 2.374-2.182 (m, 3 H).

Workup

  1. customPurification

Sources & evidence

ORD record
ord-c7b07898c512430e935af35f2e398b80
Source dataset
uspto-grants-1999_08
Patent number
US05936128

Reaction notes

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