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aReaction conditions: 1 (0.2 mmol, 1 equiv), ethers (2 mL), anhydrous FeCl3 (10 mol %), 390 nm LED (30 W), room temperature around reaction flask was 35 °C (heating caused by the LED lamp), 15 h. bMeCN (2 mL), ether (5.0 equiv, 1 mmol). All yields are isolated.
