hydroxylamine-o-sulphonic acid in methanol Ambient temperature;

iodine; sodium hydrogencarbonate in tetrahydrofuran; water Heating;

1: 1.) triethylamine, 2.) 4 N aq. HCl / 1.) CHCl3, RT, overnight, 2.) CHCl3, reflux, 5 h 2: 29 percent / hydroxylamine hydrochloride, sodium acetate / methanol; H2O / 1 h / Heating View Scheme

(i) nBuLi, THF, (ii) /BRN= 1072099/; Multistep reaction;