1: With borane-THF in tetrahydrofuran T=20°C; 2 h; 2: With sodium hydroxide; dihydrogen peroxide in diethyl ether 0.5 h; Title compound not separated from byproducts;
sodium hydrogensulfide; dihydrogen peroxide; ferric picolinate complexes in pyridine; acetic acid Ambient temperature; Title compound not separated from byproducts;