PTSA-catalyzed Mannich-type–cyclization–oxidation tandem reactions: one-pot synthesis of 1,3,5-substituted pyrazoles from aldehydes, hydrazines and alkynes
作者:Pei Liu、Ying-Ming Pan、Yan-Li Xu、Heng-Shan Wang
DOI:10.1039/c2ob25487e
日期:——
A convenient one-pot Mannich-type–cyclization–oxidation tandem process has been developed for the synthesis of 1,3,5-trisubstituted pyrazoles derivatives from aldehydes, hydrazines and alkynes using p-toluenesulfonic acid monohydrate (PTSA) as a multifunctional catalyst. This method provides a flexible and rapid route to 1,3,5-trisubstituted pyrazoles.
已经开发了一种方便的单锅曼尼希型环化氧化串联方法,该方法使用对甲苯磺酸一水合物(PTSA)作为多功能催化剂,从醛,肼和炔烃中合成1,3,5-三取代的吡唑衍生物。此方法为1,3,5-三取代的吡唑提供了灵活而快速的途径。