- 9 - Azabicyclo [3.3.1] nonane coupling [...] compound and its preparation method and use thereof (by machine translation)
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The invention discloses a 9 - azabicyclo [3.3.1] nonane coupling [...] compound, its preparation method comprises the following steps: in the organic solvent, the 9 - nitrogen (6' - amino) oneself amidogen - 9 - 9 - azabicyclo [3.3.1] nonane - 3 α - alkyl amino formic acid benzene and chloro acetyl three iodo aniline derivatives in accordance with the 1: 1.0 - 1.5 molar ratio, for the catalysis of cesium hydroxide at room temperature reaction in the 20 - 30 the H, obtained as the product of the 9 - azabicyclo [3.3.1] nonane coupling [...] compound. The invention also discloses the use thereof: a contrast agent for early diagnosis of breast cancer. (by machine translation)
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Paragraph 0069; 0070; 0072
(2018/11/22)
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- Preparation method of ioversol
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The invention provides a preparation method of ioversol. Particularly, the method provided by the invention comprises the following steps: carrying out alkylation reaction on 5-chloracetylamino-N,N'-bis-(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-phenyldiformamide and chloroethanol by using sodium hydroxide/sodium borate or sodium hydroxide/lithium chloride; and meanwhile, directly hydrolyzing the product by a one-pot multistep process, and carrying out desalting and purification to prepare the ioversol. The method simplifies the production technique process, effectively controls the generation of irremovable impurities, and is suitable for industrial production.
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Paragraph 0040; 0041; 0042; 0043; 0044-0062
(2017/05/10)
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- Preparation method for ioversol
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The invention provides a preparation method for ioversol. Specifically speaking, the method comprises the following steps: (1) performing an alkylation reaction on 5-chloracetyl amino-N,N'-bi-(2,3- dyhydroxyl propyl)-2,4,6-triiodo-1,3-phthalic diamide and chlorethyl alcohol under an alkaline condition; (2) hydrolyzing through sodium acetate to obtain the ioversol. A container of which the inner wall is coated with a corrosion-resistant coating is used in the reactions of the former two steps, and the water with the iron content of below 0.05 ppm is used. The method can effectively avoid the production of impurities which are difficult to remove, and is suitable for industrial production.
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Paragraph 0040; 0041; 0043; 0044; 0046; 0047; 0066; 0067
(2017/07/19)
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- PROCESSES FOR THE PREPARATION OF PURE IOVERSOL
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The invention relates to processes for the preparation of pure ioversol. The invention also relates to processes for the preparation of N,N'-bis(2,3-dihydroxypropyl)-5-(2- chloroacetamido)-2,4,6-triiodoisophthalamide and N,N'-bis(2,3-dihydroxypropyl)-5- [N-(2-hydroxyethyl)-2-chloroacetamido] -2,4,6-triiodoiso phthalamide, useful intermediates for the preparation of ioversol.
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Page/Page column 11
(2008/12/07)
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