“…In the benzene series, the following aldehydes were prepared by nitrone hydrolysis: 2,6-dinitro-, 2,6-dichloro-, 2-nitro-6-chloro-, and 2-nitro-6-bromobenzaldehyde (60); 4-nitrosalicylaldehyde (91, 92); a-naphthaldehyde (153); and cinnamaldehyde (153). Other aromatic aldehydes thus prepared were: (pyridine Noxide) -2-carboxaldehyde (104); pyridazine-3-carboxaldehyde (158); quinoline-2-and -4-carboxaldehyde (132,154); acridine-9-carboxaldehyde (77,172,179) and derivatives (172,179,195); cinnoline-4-carboxaldehyde (50); aldehydes in the pyrrole (226,227), indole (220,221), naphthoxazole (190), and benzselenazole series (190); benzimidazole-2-carboxaldehyde (163) and derivatives (162); thiazole-2-carboxaldehyde (231); benzthiazole-2-carboxaldehyde (129, 189); benzoxazole-2-carboxaldehyde (189); 1,3,4-thiadiazole-2-carboxaldehyde derivatives (178); and phenazine derivatives (234). Also prepared were 2-oxochrome (200), purine-6-carboxaldehyde (90), theobromine-8carboxaldehyde (38), and theophyllin-8-carboxaldehyde (38).…”