Tri-o-tolylphosphine → Ethyl (E)-4-[2-(5,6-dihydro-5,5-dimethyl-8-(phenylthio)naphthalenyl)ethenyl]benzoate

HRID 1699304Notes

Reaction equation

Br[C:2]1[CH:11]=[CH:10][C:9]2[C:8]([CH3:13])([CH3:12])[CH2:7][CH:6]=[C:5]([S:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)[C:4]=2[CH:3]=1.[CH:21]([C:23]1[CH:33]=[CH:32][C:26]([C:27]([O:29][CH2:30][CH3:31])=[O:28])=[CH:25][CH:24]=1)=[CH2:22].C1(C)C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>C(N(CC)CC)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:12][C:8]1([CH3:13])[CH2:7][CH:6]=[C:5]([S:14][C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[C:4]2[C:3](/[CH:22]=[CH:21]/[C:23]3[CH:33]=[CH:32][C:26]([C:27]([O:29][CH2:30][CH3:31])=[O:28])=[CH:25][CH:24]=3)=[CH:2][CH:11]=[CH:10][C:9]1=2

Participants

Conditions

Temperature: 90 °C

Procedure

To a degassed solution of 0.35 g (1.0 mmol) of 2-bromo-5,6-dihydro-5,5-dimethyl-8-(phenylthio)-naphthalene (Compound A35) and 0.34 g (1.9 mmol) of ethyl 4-vinylbenzoate in 4.0 mL of triethylamine, was added 0.066 g (0.2 mmol) of tri-o-tolylphosphine and then 0.025 g (0.1 mmol) of palladium(II) acetate. The reaction was heated at 90° C. for 2.25 h. The reaction was concentrated in vacuo. The residue was purified by flash chromatography (silica, 5% ethyl acetate in hexane), followed by recrystallization using EtOH to afford the title compound as white crystals.

Workup

concentrationThe reaction was concentrated in vacuo
customThe residue was purified by flash chromatography (silica, 5% ethyl acetate in hexane)
customfollowed by recrystallization

Sources & evidence

ORD record: ord-7561a8e62d274e82b13068c793e70830
Source dataset: uspto-grants-2002_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06344561B2

Reaction notes

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