3,4-dihydro-2H-pyran → 2-(6-Bromo-2,2-dimethylhexyloxy)-tetrahydropyran

HRID 239086Notes

Reaction equation

HRID 239086 reaction equation
[Br:1][CH2:2][CH2:3][CH2:4][CH2:5][C:6]([CH3:21])([C:15]1C=CC=CC=1)[CH2:7][O:8][CH:9]1[CH2:14][CH2:13][CH2:12][CH2:11][O:10]1.BrCCCCC(C)(C)CO.O1C=CCCC1>C(Cl)Cl.O.C1(C)C=CC(S(O)(=O)=O)=CC=1>[Br:1][CH2:2][CH2:3][CH2:4][CH2:5][C:6]([CH3:21])([CH3:15])[CH2:7][O:8][CH:9]1[CH2:14][CH2:13][CH2:12][CH2:11][O:10]1

Participants

6

Reactant 3

HCID 80803,4-dihydro-2H-pyranHCID 100359856-Bromo-2,2-dimethyl-1-hexanolHCID 112104532-(6-Bromo-2-methyl-2-phenylhexyloxy)-tetrahydropyran

Product 1

HCID 103796142-(6-Bromo-2,2-dimethylhexyloxy)-tetrahydropyranYield 83%

Reagents, catalysts & solvents 2

HCID 521998p-Toluenesulfonic acid monohydrateCatalystHCID 6344DichloromethaneSolvent

Procedure

According to the procedure for the preparation of 207d, (Ackerley, N. et al. J. Med. Chem. 1995, 38, 1608-1628; Manley, P. W. et al. J. Med. Chem. 1987, 30, 1812-1818) 206c (521.0 g, 2.49 mol) was reacted with 3,4-dihydro-2H-pyran (278.0 g, 3.30 mol) and p-toluenesulfonic acid hydrate (3.13 g, 16 mmol) in CH2Cl2 (2.2 L) to yield 207c (603.0 g, 83%) as a pale-yellow oil, which was used without further purification. 1H NMR (CDCl3): δ 4.55 (t, 1 H, J=3.3), 3.84 (m, 1 H), 3.50 (m, 1 H), 3.47 (d, 1 H, J=9.0), 3.42 (t, 2 H, J=6.7), 2.99 (d, 1 H, J=9.0), 1.88 (m, 2 H), 1.75-1.33 (m, 10 H), 0.91 (s, 3 H), 0.90 (s, 3 H). 13C NMR (CDCl3): δ 99.37, 76.58, 62.17, 38.56, 34.43, 34.19, 33.90, 30.88, 25.79, 24.80, 24.71, 22.89, 19.67. HRMS (LSIMS, nba): Calcd for C13H25BrO2 (MH+): 293.1116, found: 293.1128.

Sources & evidence

ORD record
ord-d1c91f0551484a9888885b7f23e1417d
Source dataset
uspto-grants-2014_02
Patent number
US08642653B2

Reaction notes

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