16397-70-9Relevant articles and documents
Preparation method of sun-screening agent octyl triazinone
-
Paragraph 0051; 0095-0096, (2021/02/06)
The invention discloses a preparation method of a sun-screening agent octyl triazinone, octyl triazinone prepared by the preparation method and an application of octyl triazinone, and the method comprises the following steps: step 1, carrying out esterification reaction on p-nitrobenzoic acid and isooctyl alcohol to obtain a product I, 2, carrying out a hydrogenation reaction on the product I in the presence of a catalyst, filtering after the reaction is completed, and carrying out reduced pressure distillation to obtain a product II, and step 3, adding a solvent into the product II, heating to reflux, adding the solution A, carrying out a reaction, and carrying out post-treatment to obtain octyltriazinone. Cheap and easily available p-nitrobenzoic acid is used as a raw material, the sun-screening agent octyl triazinone is efficiently prepared through esterification, hydrogenation and coupling, meanwhile, iso-octyl p-aminobenzoate is obtained, the obtained octyl triazinone is high in chromatographic purity and yield, and the method has the advantages of being few in three wastes, low in cost, green, environmentally friendly, easy to operate, easy to control and the like.Easy realization of industrial production.
COMPOSITIONS AND METHODS FOR STORING HOLOGRAPHIC DATA
-
Page/Page column 13, (2009/04/24)
In one aspect, the present invention provides a novel thiophene-containing polynitrone compound having structure (II) wherein R1 is independently at each occurrence a C1-C20 aliphatic radical, a C3-C20 /su
