Sodium Carbonate → trans-2-benzyl-3a-methyl-6-(prop-1-en-2-yl)-2,3,3a,4,5,9b-hexahydro-1H-benzo[e]isoindole

HRID 1026634Notes

Reaction equation

[CH2:1]([N:8]1[CH2:16][C@@H:15]2[C@:10]([CH3:22])([CH2:11][CH2:12][C:13]3[C:20](Br)=[CH:19][CH:18]=[CH:17][C:14]=32)[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(=O)([O-])[O-].[Na+].[Na+].[CH3:29][C:30]1(C)[C:34](C)(C)OB(C(C)=C)O1>COCCOC.C(O)C.O>[CH2:1]([N:8]1[CH2:16][C@@H:15]2[C@:10]([CH3:22])([CH2:11][CH2:12][C:13]3[C:20]([C:30]([CH3:34])=[CH2:29])=[CH:19][CH:18]=[CH:17][C:14]=32)[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 160 °C

Procedure

trans-2-Benzyl-6-bromo-3a-methyl-2,3,3a,4,5,9b-hexahydro-1H-benzo[e]isoindole (0.561 mmol, 200 mg) was dissolved in DME (1 ml) and Ethanol (0.5 ml). 2 N sodium carbonate solution (1 ml) was added along with 4,4,5,5-tetramethyl-2-(prop-1-en-2-yl)-1,3,2-dioxaborolane (0.842 mmol, 141 mg) and tetrakis(triphenylphosphine)Pd(0) (0.028 mmol, 32.4 mg). The reaction mixture was heated at 160° C. for 15 minutes in a microwave reactor and then diluted with water. The resulting mixture was extracted with DCM and the combined organic extracts were concentrated in vacuo to give a crude residue that was purified by silica column chromatography (eluting with 10% EtOAc in heptane) to afford trans-2-benzyl-3a-methyl-6-(prop-1-en-2-yl)-2,3,3a,4,5,9b-hexahydro-1H-benzo[e]isoindole (134 mg), m/z: 318.2 [M+H]+.

Workup

extractionThe resulting mixture was extracted with DCM
concentrationthe combined organic extracts were concentrated in vacuo
customto give a crude residue that
customwas purified by silica column chromatography (eluting with 10% EtOAc in heptane)

Sources & evidence

ORD record: ord-4e0b15cc482c48179a7d8aedac28d292
Source dataset: uspto-grants-2014_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08729274B2

Reaction notes

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