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

HRID 357880Notes

Reaction equation

HRID 357880 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-c028fca2564c4d14b2416c2ca931383c
Source dataset
uspto-grants-1998_11
Patent number
US05840751

Reaction notes

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