2-Benzylideneglutaraldehydes of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently are hydrogen or a substituent selected from the group consisting of halo, lower-alkyl, phenyl, carboxy, lower-alkoxycarbonyl, phenoxycarbonyl, aminocarbonyl, hydroxysulfonyl, nitro, cyano, hydroxy, lower-alkoxy and phenoxy, a method of use thereof as disinfectants, disinfectant compositions comprising them, and 2,6-dialkoxy-3-(.alpha.-alkoxybenzyl)tetrahydropyrans of the formula ##STR2## where R.sup.1, R.sup.2 and R.sup.3 are as defined above and R.sup.4 and R.sup.5 independently are alkyl of one to four carbon atoms, which are intermediates for their preparation are disclosed.
本发明涉及一种公式为##STR1##的2-苯甲基
丁二醛,其中R1,R2和R3独立地为氢或从卤素,低烷基,苯基,羧基,低烷氧羰基,苯氧羰基,
氨基羰基,羟基磺酰基,硝基,
氰基,羟基,低烷氧基和苯氧基等组成的取代基,以及其作为消毒剂的使用方法,包括它们的消毒剂组合物,并且公式为##STR2##的2,6-二烷氧基-3-(α-烷氧基苯基)
四氢吡喃,其中R1,R2和R3如上定义,R4和R5独立地为一至四个碳原子的烷基,是其制备的中间体。