Specific Synthesis of 1-Substituted Phenothiazines Using Carbon Dioxide Protection of the NH Group During Lithiation
作者:Alan R. Katritzky、Luis M. Vazquez de Miguel、Gordon W. Rewcastle
DOI:10.1055/s-1988-27515
日期:——
The lithiation of phenothiazine when protected as the lithium salt of its carbamate occurs exclusively at the C-1 carbon atom. Reaction of the lithiated species with a variety of electrophiles readily produced several new 1-substituted phenothiazines, as well as a number of known compounds in superior yield to existing methods.
Acylations of 1,10-dilithiophenothiazine. A new synthesis of 1-formylphenothiazine
作者:Anders Hallberg、Arnold Martin
DOI:10.1002/jhet.5570190245
日期:1982.3
The synthesis of 1-formyl-, 1-benzyyl-, 1-anisoyl-, and 1-nicotinyl-phenothiazines (1–4) resulting from the reaction of the corresponding amids with 1,10-dilithiophenothiazine (5) is reported. The site of attachment on 1,10-dilithiophenothiazine, based on the nature of some different acylating reagents, is also discussed.