hydrogen sulfide; hydroxylamine hydrochloride 1) MeOH, RT, overnight 2) H2O 3) MeOH; Yield given. Multistep reaction;

1: 1) Et3N, ethyl chloroformate 2) Et3N / 1) DMF, CHCl3, -5 to 0 deg C 2) DMF, CHCl3, 0 to 5 deg C, 1 h then RT, overnight 2: 1) NH2OH*HCl 2) CuCl2*2H2O 3) H2S / 1) MeOH, RT, overnight 2) H2O 3) MeOH View Scheme