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Acetone Cyanohydrin → 5,6-Dihydro-4-hydroxy-3-[(2-methylphenyl)methyl]-6-phenyl-6-(2-phenylethyl)-2H-pyran-2-one

HRID 357876
Notes
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Reaction equation

HRID 357876 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.[CH3:30][C:31]1[CH:39]=[CH:38][CH:37]=[CH:36][C:32]=1[C:33](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[CH2:30][C:31]1[CH:39]=[CH:38][CH:37]=[CH:36][C:32]=1[CH3:33]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

9

Reactant 5

HCID 6406Acetone CyanohydrinHCID 8471Triethylamine2×HCID 702762-Methylbenzoyl chlorideHCID 5003444Sodium cyanoborohydrideHCID 546823015,6-dihydro-4-hydroxy-6-phenyl-6-(2-phenylethyl)-2H-pyran-2-one

Product 1

HCID 54721609
5,6-Dihydro-4-hydroxy-3-[(2-methylphenyl)methyl]-6-phenyl-6-(2-phenylethyl)-2H-pyran-2-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 (0.250 g, 0.850 mmol), Et3N (0.12 mL, 0.85 mmol), 2-methylbenzoyl chloride (0.11 mL, 0.85 mmol), CH2Cl2 (5.0 mL), acetonitrile (4.0 mL), acetone cyanohydrin (0.04 mL, 0.43 mmol), Et3N (0.24 mL, 1.7 mmol), glacial acetic acid (10.0 mL), sodium cyanoborohydride (0.151 g, 2.4 mmol). Purification was achieved by submitting the final residue to column chromatograpy (SiO2, 100% CH2Cl2 to 2% MeOH in CH2Cl2) to provide a solid (0.195 g, m.p. 109°-111° C.). 1H NMR (400 MHz, DMSO-d6) δ 10.886 (bs, 1 H), 7.457-7.359 (m, 5 H), 7.242 (t, 2 H, J=7 Hz), 7.169-7.130 (m, 1 H), 7.097 (d, 2 H, J=7.5 Hz), 7.001 (d, 1 H, J=7.5 Hz), 6.937 (t, 1 H, J=7.5 Hz), 6.695 (t, 1 H, J=7 Hz), 6.215 (d, 1 H, J=7.5 Hz), 3.292 (d, 1 H, J=17 Hz), 3.169 (d, 1 H, J=17 Hz), 2.643-2.584 (m, 1 H), 2.50-2.475 (2 H+solvent) 2.296-2.182 (m, 3 H), 2.125 (s, 3 H).

Workup

  1. customPurification

Sources & evidence

ORD record
ord-95ebc937364f4f16899688a3ec2e8815
Source dataset
uspto-grants-1998_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05840751

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes