sodium hydroxide; dihydrogen peroxide in tetrahydrofuran -100°C, after 15 min warming to room temp. with stirring, keeping overnight, treating with H2O2-NaOH at 0°C, stirring for 1 h at room temp. and for 15 min at 50°C; Aq. phase is satd. with K2CO3, extd. with diethyl ether, combined organic phases are dried (K2CO3), concd., chromd. (silicagel, ethyl acetate-petroleum ether);

sodium hydroxide; dihydrogen peroxide Yield given. Multistep reaction;

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(i) THF, (ii) aq. HCl, (iii) aq. H2O2, EtOH; Multistep reaction;