616201-80-0Relevant articles and documents
Niclosin hydrochloride pellet, and preparation method and preparation thereof
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Paragraph 0049; 0084; 0088, (2020/05/14)
A lorcaserin hydrochloride mini-pill is provided. The mini-pill comprises a blank pill core, a medicine loading layer, a slow-release layer and a quick-release layer in order from inside to outside. The medicine loading layer comprises lorcaserin hydrochloride, lactose monohydrate, highly substituted hydroxypropylcellulose and talcum powder. The slow-release layer comprises ethyl cellulose, highly substituted hydroxypropylcellulose, talcum powder and triethyl citrate. The quick-release layer comprises lorcaserin hydrochloride, lactose monohydrate, highly substituted hydroxypropylcellulose and talcum powder. The mass ratio of the sum of the weight of the blank pill core and the weight of the medicine loading layer to the mass of the slow-release layer is 1:(0.25-0.35). The mini-pill comprises the slow-release layer and the quick-release layer, and therefore a medicine can rapidly work and functions of the medicine in a body are prolonged. A preparing method of the lorcaserin hydrochloride mini-pill and a preparation of the lorcaserin hydrochloride mini-pill are also provided.
Preparation method of key intermediate I of lorcaserin
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, (2018/09/26)
The invention discloses a preparation method of a key intermediate I of lorcaserin. The preparation method comprises the steps as follows: (1) in an organic solvent A, 2,4'-dichloroacetophenone is subjected to a condensation reaction with isopropanolamine under catalysis of alkali, and 1-(4-chlorophenyl)-2-((2-hydroxypropyl)amino)ethane-1-one is obtained; (2) the 1-(4-chlorophenyl)-2-((2-hydroxypropyl)amino)ethane-1-one obtained in the step (1) is subjected to catalytic reduction with sodium borohydride and acid in a solvent B, and the key intermediate I of lorcaserin is obtained. The preparation method can synthesize the key intermediate I of lorcaserin from cheap and easily available raw materials under mild reaction conditions, has the advantages of being simple to operate, low in costand high in yield, and is energy-saving, environmentally friendly and suitable for mass production.
Preparation method and use of lorcaserin hydrochloride
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Paragraph 0027; 0028, (2017/08/28)
The invention provides a preparation method of lorcaserin hydrochloride, wherein the preparation method comprises the synthetic route described in the specification. The preparation method of lorcaserin hydrochloride has the advantages of simpliness, cheap and easily available raw materials, convenient and safe post-processing, and more green and environmental-protection preparation process, and is an economic synthetic method which can be industrialized.