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

HRID 965490

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-b8ee9d94292e43ad9d037d4aaa1e830e
Source dataset: uspto-grants-1998_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05773594

Linked notes

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