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Reagents and conditions: (a)50 I2, propylene oxide, hν (500 W high-pressure mercury vapor lamp), rt, 2 h, 64%; (b) (1) CH3I, MeCN, reflux, overnight, (2) KPF6, acetone, 2 h, 95%; (c) MeOH, hν (500 W high-pressure mercury vapor lamp), O2, 10%; (d)51,52 iodine, propylene oxide, toluene, hν.
