作者:Shokoofeh Maghari、Sorour Ramezanpour、Fatemeh Darvish、Saeed Balalaie、Frank Rominger、Hamid Reza Bijanzadeh
DOI:10.1016/j.tet.2012.11.071
日期:2013.2
An efficient method for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles from isothiocyanates and hydrazides through cyclodesulfurization in the presence of (O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate) TBTU as an uronium coupling reagent has been developed. The present methodology offers several advantages, such as simple and easy work-up procedures, mild reaction conditions
用于从异硫氰酸酯和酰肼2,5-二取代的1,3,4-恶二唑,通过环化脱硫中的(存在下合成的有效方法Ô(苯并三唑-1-基) - - ñ,Ñ,N' ,N' -已经开发出四甲基脲鎓四氟硼酸酯(TBTU)作为铀偶联剂。本方法具有几个优点,例如简单和容易的后处理程序,温和的反应条件,并且对环境无害。