N-Protected N2-Ethoxymethylenephenylglycine Hydrazides as Precursors of 1,3,4-Oxadiazole Derivatives
摘要:
New derivatives of N-2-ethoxymethylene phenylglycine hydrazide protected at the amino group by acetyl and tert-butoxycarbonyl were synthesized with reactions of N-protected phenylglycine hydrazides and triethyl orthoesters. They underwent cyclization to the corresponding N-protected 2-aminomethyl-1,3,4-oxadiazoles in the presence of glacial acetic acid.