1137261-90-5Relevant articles and documents
Method of preparing 1,3-diketone compound by acetyenic ketone
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Paragraph 0062-0068, (2019/06/12)
The invention relates to a preparation method of preparing a 1,3-diketone compound by acetyenic ketone. The preparation method comprises the following steps: S1, putting alpha-alkynyl ketone compound,water, gold salt and silver salt in a reaction solvent to obtain a precursor mixture, wherein the molar ratio of the alpha-alkynyl ketone compound, water, gold salt and silver salt is 1: (1-50): (0.001-0.10): (0.002-0.15); and S2, putting the precursor mixture obtained in the S1 to react at a reaction temperature of 0-50 DEG C to obtain the 1,3-diketone compound, wherein the reaction time is 5 min to 48 h. The method is simple in reaction condition, free of acid or alkaline additives and high in yield, and can be applied to modern production on a large scale.
PROCESS FOR PREPARING 2-ALKYL-3-AROYL-5-NITRO-BENZOFURANS
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Page/Page column 7-8, (2011/08/04)
The present invention relates to a process for the preparation of a compound of formula wherein R1 is selected from C1-6-alkyl, C3-6-cycloalkyl and aralkyl, and wherein R2 at each occurrence independently is halogen or C1-6-alkyl, and m is an integer from 0 to 4, Q is selected from halogen, —NO2 and —NR3R4, wherein R3 and R4 are independently selected from hydrogen, C1-6-alkyl, C3-6-cycloalkyl, aryl, aralkyl, mesyl and tosyl, or wherein R3 and R4 together form a C4-6-alkylene group, Y at each occurrence is hydrogen or a hydroxy protection group W that can be hydrolytically cleaved under acidic conditions, and n is an integer from 1 to 3, and n is an integer from 1 to 3, with the proviso that n and m together are not greater than 5.
Process for preparing 2-Alkyl-3-aroyl-5-nitro-benzofurans
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Page/Page column 12, (2010/11/17)
The present invention relates to a process for the preparation of a compound of formula wherein R1 is selected from C1-6-alkyl, C3-6-cycloalkyl and aralkyl, and wherein R2 at each occurrence independently is halogen or C1-6-alkyl, and m is an integer from 0 to 4, Q is selected from halogen, -NO2 and -NR3R4, wherein R3 and R4 are independently selected from hydrogen, C1-6-alkyl, C1-6-cycloalkyl, aryl, aralkyl, mesyl and tosyl, or wherein R3 and R4 together form a C4-6-alkylene group, Y at each occurrence is hydrogen or a hydroxy protection group W that can be hydrolytically cleaved under acidic conditions, and n is an integer from 1 to 3, and n is an integer from 1 to 3, with the proviso that n and m together are not greater than 5.