Convenient Method for the ortho-Formylation of Phenols.
作者:Nini U. Hofsløkken、Lars Skattebøl、Fredrik Johansson、Sophie K. Bertilsson、Pher G. Andersson、Jørgen Møller、Alexander Senning、Xin-Kan Yao、Hong-Gen Wang、J. -P. Tuchagues、Mattias Ögren
DOI:10.3891/acta.chem.scand.53-0258
日期:——
Phenolic derivatives are formylated selectively ortho to the hydroxy group by paraformaldehyde with magnesium dichloride triethylamine as base. With alkyl-substituted phenols excellent yields of the corresponding salicylaldehyde derivatives were obtained. Similar results were obtained with chloro-substituted phenols and with 3-and 4-methoxyphenol while 2-methoxyphenol was unreactive. A good yield of methyl 3-formyl-4-hydroxybenzoate was obtained by this method as well, but generally phenols with electron-attracting groups reacted sluggishly; the long reaction times required caused the formation of by-products. particularly MOM-derivatives of the phenols.
Reaction of Phenolic Mannich Base Methiodides and Oxides with Various Nucleophiles
作者:Pete D. Gardner、Hossein Sarrafizadeh Rafsanjani、Leon Rand