This report deals with the preparation of lignin samples by treating soda lignin from beech-wood and cryptomeria with acid chlorides, such as phosphorus oxychloride, sulfuryl chloride and thionyl chloride, and this is oxidatively de composed with mercury oxide or copper ocide to obtain 2, 5-dihydroxybenzal-deyde and 2, 5-dihydroxybenxoic aid from soda lignin of beech-wood, and 3, 4-dihydroxybenzaldehyde and 3, 4-dihydroxybenzoic acid from soda lignin of cryptomeria.
When N-(1, 2-diacetoxyethyl)-phthalimide was pyrolyzed under high temperatures, it was found that the dehydroacetoxylation proceeded in a highly selective manner to give N-(2-acetoxyvinyl)-phthalimide. Pyrolysis of N-(1-acetoxy-2-bromoethyl)-phthalimide at 537±3 produced N-(2-bromoviny1)-phthalimide.
α-(α-Quinolyl)-perinaphthoindan-1, 3-dione (quinonaphthalone)(3) was synthesized from condensation of phthalic anhydride (1) and quinaldine (2). The III was further sulfonated to obtain sodium quinonaphthalone monosulfonate (4). Dyeing quality of IV for wool has been investigated and it was found that the fixation of the dye was good, it gave clear yellow color with a strong fluorescense, showed good resistance for washing but the stability against the exposure tosunlight was poor.
It was found that malonamide or its C-alkyl derivatives and ethyl carbonate in liquid ammonia in the presence of caustic alkali were easily condensed at room temperature and formed barbituric acid derivatives. A suspension or solution of a mixture composed of malonamide derivatives, ethyl carbonate and caustic alkali (a commercial granulated product)(1:1:2 molar ratio) is stirred for 0.5-1.0 hour at room temperature to complete the reaction. The yield in case of using caustic soda was 56% barbituric acid, 44% ethylbarbituric acid, 78 (100%) isoamylbarbituric acid, 35 (77%) diethylbarbituric acid, 82 (95%) diallylbarbituric acid, and 40 (100%) ethylisoamylbarbituric acid. The yields in parentheses indicated the values from malonamide derivatives actually used for the reaction. C-Mono-or C-dialkylmalonamide used in this investigation was synthesized by alkylation1) of malonamide in liquid ammonia in the presence of caustic alkali.