sodium hydroxide in diethyl ether 72 h; Ambient temperature;

hydroxocobalamine hydrochloride; lithium perchlorate in N,N-dimethyl-formamide Ambient temperatureIrradiationelectrolysis at constant potential -0.95 V (vs. SCE);

2,2'-azo-bisisobutyronitrile T=80°C; 40 h;

1: 88 percent / benzene / 17 h / Heating 2: 1.) LiNEt2 / 1.) HMPT, benzene, THF, -45 deg C, 1.5 h, 2.) -45 deg C, 30 min; room temp., overnight 3: 10percent aq. HCl / hexamethylphosphoric acid triamide; benzene; tetrahydrofuran / 11.5 h / Heating 4: 1.) O3, 2.) Me2S / 1.) CH2Cl2, -60 deg C, 2.) -60 deg C, then room temp. View Scheme

dimethylsulfide; oxygen; ozone 1) isopropanol, -50 to -45 degC; Yield given. Multistep reaction;

dimethylsulfide; ozone 1.) CH2Cl2, -60 deg C, 2.) -60 deg C, then room temp.; Yield given. Multistep reaction;

triethylamine; 5-(2-hydroxyethyl)-4-methyl-3-(phenylmethyl)thiazolium chloride 12 h; Heating;