Ruthenium‐Catalyzed Intermolecular Cyclization and N‐Methylation of Salicyl N‐Tosylhydrazones
作者:Siva Hariprasad Kurma、Sai Teja Kolla、Balasubramanian Sridhar、China Raju Bhimapaka
DOI:10.1002/ejoc.202200336
日期:2022.6.13
A method was developed for the preparation of 3-(2,2-dichloroacetyl)-2H-chromen-2-ones and (E)-N′-(2-hydroxybenzylidene)-N,4-dimethylbenzenesulfono hydrazides by reacting salicyl N-tosylhydrazones with ethyl 4,4,4-trichloro-3-oxobutanoate and dimethyl (1-diazo-2-oxopropyl)-phosphonate (Bestmann-Ohira reagent) in presence of RuCl3 ⋅ 3H2O.
建立了水杨基N反应制备3-(2,2-二氯乙酰基)-2H-色烯-2-酮和( E ) -N' -(2-羟基亚苄基) -N ,4-二甲基苯磺酰肼的方法。-甲苯磺酰腙与 4,4,4-三氯-3-氧代丁酸乙酯和 (1-重氮-2-氧代丙基)-膦酸二甲酯(Bestmann-Ohira 试剂)在 RuCl 3 ⋅ 3H 2 O存在下。