机译:Synthesis of 6,7-Dihydroindazole and 7,8-Dihydroquinazoline Derivatives from Ethyl 4,4-Dimethyl-9-oxo-3,4-dihydro-9H-xanthene-2-carboxylates
St Petersburg State Chem & Pharmaceut Univ, St Petersburg 197376, Russia;
3; 4-dihydroxanthone; 6; 7-dihydroindazole; 7; 8-dihydroquinazoline; ANRORC reaction;