Synthesis of substituted planar triarylmethanes.

Abstract

Two protective groups, benzyl and butyl, were utilized to protect the central carbon of sesquixanthene in electrophilic sUbstitution reactions. Attempts were also made to perform substitution on unprotected sesquixanthene. Nitration was carried out on sesquixanthene where the central carbon was protected and where the central carbon was unprotected. After bromination and nitration, cleavage of the protective group by oxidation was successful. Reduction of the nitro groups to amino groups by tin metal and stannous chloride was also attempted, but because of inavailability of necessary analytical methods, the results were inconclusive.