Substituted 2-methyl- and 2-methyleneindolines. 6. Adducts of dialkylphosphites with 1,3,3-trimethyl-2-methyleneindoline. Reagents for synthesizing 5-substituted 2-methyl- and 2-methyleneindolines
The readily formed addition products of dialkylphosphites and 1,3,3-trimethyl-2-methyleneindoline have been used to synthesize 1,2,3,3-tetramethyl-3H-indolium salts and their derivatives substituted in the benzene ring. In most cases the protecting phosphorus group can be readily removed by adding mineral acids.
KeywordsPhosphorus Benzene Organic Chemistry Adduct Benzene Ring
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