Electrophilic aromatic substitution with N-methoxy-N-acylnitrenium ions generated from N-chloro-N-methoxy amides: syntheses of nitrogen heterocyclic compounds bearing a N-methoxy amide group
Intramolecular Cyclization with Nitrenium Ions Generated from<i>N</i>-Chloro-<i>N</i>-methoxyamides in Neutral Conditions
作者:Yasuo Kikugawa、Masahiro Shimada
DOI:10.1246/cl.1987.1771
日期:1987.9.5
Intramolecular aromatic substitution by a N-chloro-N-methoxyamide group to a suitably situated aromatic ring in the molecule is performed by using anhydrous zinc acetate and nitromethane as solvent to give nitrogen heterocycles in good yield.
Cyclization with Nitrenium Ions Generated from N-Methoxy- or N-Allyloxy-N-chloroamides with Anhydrous Zinc Acetate. Synthesys of N-Hydroxy- and N-Methoxynitrogen Heterocyclic Compounds
Electrophilic intramolecular aromatic substitution with an N-methoxy- or an N-allyloxy-acylnitrenium ion, generated by treatment of an N-methoxy- or an N-allyloxy-N-chloroamide with anhydrous zinc acetate in nitromethane, leads to formation of a nitrogen heterocyclic compound bearing an N-methoxy- or N-allyloxy group. The latter is readily converted to the corresponding N-hydroxy compound by palladium-catalyzed removal of the allyl group.
Kikugawa Yasuo, Shimada Masahiro, Matsumoto Kazuhiro, Heterocycles, 37 (1994) N 1, S 293-301
KIKUGAWA, YASUO;SHIMADA, MASAHIRO, CHEM. LETT.,(1987) N 9, 1771-1774
作者:KIKUGAWA, YASUO、SHIMADA, MASAHIRO
DOI:——
日期:——
Electrophilic aromatic substitution with N-methoxy-N-acylnitrenium ions generated from N-chloro-N-methoxy amides: syntheses of nitrogen heterocyclic compounds bearing a N-methoxy amide group