Condensation of N-(p-nitrobenzyl)-10,10-dimethyl-9,10-dihydro-10-sila-2-azaanthracene bromide and its 9-oxo derivative with acetylenedicarboxylic ester
Condensation of N-(p-nitrobenzyl)-10,10-dimethyl-9,10-dihydro-10-sila-2-azaanthracene bromide and its 9-oxo derivative with acetylenedicarboxylic ester