Resinous Matter Obtained in Perkin Reaction of Salicylaldehyde
نویسندگان
چکیده
منابع مشابه
Further Evidence for the Mechanism of Formation of Coumarin by Perkin Reaction from salicylaldehyde and a Novel Synthesis of 1,1-diphenyl-2(2'-hydroxyphenyl) ethene from O-α,α-diphenylacetylsalicylaldehyde with Et3N
The mechanism of formation of coumarin (1) by Perkin reaction from salicylaldehyde was shown to involve exclusively a basecatalyzed intramolecular aldol-type condensation of O-acetyl salicylaldehyde (2) as an obligatory intermediate followed by dehydration. Direct evidence in support of this contention was provided by the formation of coumarin and 3-phenyl coumarin(5) as the sole products in th...
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In the title compound, C(17)H(21)N(3)O(3)S, the dihedral angle between the aromatic ring planes is 84.2 (2)°. The pendant ethyl groups of the -N(C(2)H(5))(2) group are disordered over two sets of positions in a 0.84 (2):0.16 (2) ratio. The mol-ecular conformation is stabilized by an intra-molecular O-H⋯N hydrogen bond, and inter-molecular N-H⋯O bonds lead to [010] chains in the crystal structure.
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The synthesis of propargylamines via A3 coupling mostly under metal-catalyzed procedures is well known. This work invented an unprecedented effect of salicylaldehyde, one of the A3 coupling partners, which could lead to the formation of propargylamine, an important pharmaceutical building block, in the absence of any metal catalyst and under mild conditions. The role of the hydroxy group in ort...
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The condensation reaction between carbohydrazide and salicylaldehyde was monitored in-line by using vibrational NIR and Raman spectroscopies and statistical methods. Prior to in-line data analysis the reaction products were fully characterized in solution and solid state in order to check the potential of the in-line approach as a tool for in-process Schiff bases reaction control. It was demons...
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Dunalia spinosa, a plant used in folk medicine for toothaches, breathing problems and cleansing wounds, was found active as antimicrobial and antioxidant. A new (E)-aurone rutinoside (dunaurone) has been isolated from the aerial parts of the plant, and its structure was determined by spectroscopic means. Lupeol, beta-sitosterol, scopoletin, quercetin and withaferin A were also found. All the ex...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1957
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.60.656