73334-07-3Relevant articles and documents
Preparation method and application of iopromide intermediate (by machine translation)
-
, (2020/07/24)
The invention relates to a preparation method of an iopromide intermediate and an application thereof in preparation of iopromide. The method comprises the following steps: compound VI compound is subjected to reduction reaction under the action of Raney nickel/hydrazine hydrate to obtain the compound V compound. The reaction is carried out under normal pressure, the operation is simple and safe, the generated intermediate impurities are less, and the reaction is more suitable for industrial production. The method is used for preparing iopromide, can avoid the generation of a diacylated by-product, can effectively reduce the generation of by-products in the preparation process, can be easily separated and purified, and can obtain high-purity iopromide with high yield. (by machine translation)
Preparation methods of iopromide and intermediate of iopromide
-
, (2018/03/24)
The application of the invention relates to preparation methods of iopromide and an intermediate of the iopromide. The method specifically comprises the following steps: conducting a reduction reaction, an iodination reaction and an acylation reaction on a compound shown in the formula VI to prepare a compound shown in the formula III, and further preparing to obtain the iopromide. The method notonly avoids the generation of double acylation byproducts, but also effectively reduces the generation of byproducts in the preparation process, the intermediate is easy to separate and purify, and ahigh-purity product is obtained at a relatively high yield.
The new method of preparing [...] (by machine translation)
-
, (2018/12/13)
The invention relates to a preparation method of iopromide. 5-methoxylacetamido-2,4,6-triiodo m-phthalic acid[(2-oxo-1,3-dioxolame-4-yl)methyl]amido chloride (Formula V) and 5-methoxylacetamido-2,4,6-triiodo m-phthalic acid{[(2-oxo-1,3-dioxolame-4-yl)methyl]-(2,3-dyhydroxyl-N-methyl propyl)}diamide (Formula VI) are introduced to be used as intermediates. Even if there is no additional purification step, a bismer by-product generated during the reaction also can be removed by introduction of the intermediates and high-purity iopromide can be prepared at high yield.