Ortho Lithiation of N-Pivaloylfluoroanilines as a Useful Tool for Either Selective Methylation or Benzoxazole Synthesis
摘要:
Lithiation of N-pivaloyl-3,4-difluoroaniline (1a) with a slight excess of 2 mole equiv of n-butyllithium followed by methylation was studied. The reaction was found to be useful for either the selective methylation of 3,4-difluoroaniline or the synthesis of benzoxazole derivatives, depending on the reaction temperature. In the reaction of N-pivaloyl-3-chloro-4-fluoroaniline (1b) and N-pivaloyl-3-fluoroaniline (1c), the reaction proceeded rather sluggishly but benzoxazole formation predominated.
[EN] 6-AZA-QUINOLINE DERIVATIVES AND RELATED USES [FR] DÉRIVÉS DE 6-AZA-QUINOLÉINE ET UTILISATIONS ASSOCIÉES
摘要:
The present disclosure relates compounds of Formula (0): and pharmaceutically acceptable salts and stereoisomers thereof. The present disclosure also relates to methods of preparing the compounds, compositions comprising the compounds, and methods of using the compounds, e.g., in the treatment of cancer.