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Although a radical adsorbed on an electrode surface might display altered behavior, we believe that the slightly nucleophilic character of the alkyl radical 3 is preserved. See, for example: (a) Chkir, M, Lelandais, D. J. Chem. Soc, Chem. Commun. 1971, 1369
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56849096377
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Representative Procedure for the Electrochemical Synthesis of Carbocycles and Heterocycles In an undivided beaker-type cell (100 mL) bearing two electrodes of platinum foil (1.3 cm x 1.3 cm x 0.5 mm, acid 22a (500 mg, 2.47 mmol) and a fivefold excess of AcOH (707 mL, 12.38 mmol) were dissolved in MeOH (50 mL, The acids were partially neutralized by NaOMe to obtain a current density of 100 mA/cm2. The reaction was monitored by TLC or GC and stopped when the pH of the solution changed from 5 to 8; normally 1.2-1.4 F/mol had been consumed. The reaction mixture was then concentrated under reduced pressure. The residue was treated with a sat. aq solution of NaHCO3, and extracted with CH2Cl2 (3 x 10 mL, The organic layers were collected, dried on Na2SO 4, and concentrated under reduced pressure. The crude material was purified by flash chromatography (PE-Et2O, 4:1) to afford 366 mg of compound 23
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3): δ = 14.20 (A), 14.23 (B), 16.1 (A), 16.2 (B), 30.3 (B), 30.8 (A), 42.39 (A), 42.41 (B), 42.90 (B), 42.93 (A), 60.4 (A + B), 68.0 (A), 68.1 (B), 71.1 (A), 71.9 (B), 175.7 (A + B). MS (APCI): m/z (%) = 82.9 (15), 126.9 (95), 144.9 (15), 173.0(10). HRMS (sodium complex): m/z calcd: 195.0997; found: 195.0998.
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56849102041
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Compound 27 originates from a possible rearrangement of either the primary radical or the derived carbocation. Studies are currently ongoing to elucidate this intriguing transformation.
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Compound 27 originates from a possible rearrangement of either the primary radical or the derived carbocation. Studies are currently ongoing to elucidate this intriguing transformation.
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