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190730-42-8

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190730-42-8 Usage

Uses

(R)-Bepotastine Besylate is the R-isomer of (S)-Bepotastine Besylate (B317000); a histamine H1 receptor antagonist. Bepotastine suppresses some allergic inflammatory processes such as allergic rhinitis, chronic urticaria or pruritus associated with skin conditions (eczema/dermatitis, prurigo or pruritus cutaneus).

Check Digit Verification of cas no

The CAS Registry Mumber 190730-42-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,7,3 and 0 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 190730-42:
(8*1)+(7*9)+(6*0)+(5*7)+(4*3)+(3*0)+(2*4)+(1*2)=128
128 % 10 = 8
So 190730-42-8 is a valid CAS Registry Number.
InChI:InChI=1/C21H25ClN2O3.C6H6O3S/c22-17-8-6-16(7-9-17)21(19-4-1-2-12-23-19)27-18-10-14-24(15-11-18)13-3-5-20(25)26;7-10(8,9)6-4-2-1-3-5-6/h1-2,4,6-9,12,18,21H,3,5,10-11,13-15H2,(H,25,26);1-5H,(H,7,8,9)/t21-;/m1./s1

190730-42-8Downstream Products

190730-42-8Relevant articles and documents

Total synthesis method of bestatin

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, (2021/10/11)

The method comprises the following steps: (4 - chlorophenyl) (2 - pyridyl) - methanol as a starting raw material, and sequential addition reaction. Examples of the etherification reaction include a deprotection reaction, a chiral resolution, a condensation reaction, a hydrolysis reaction, and the like. The synthesis method has the advantages of cheap and easily available raw materials, no need of expensive chiral catalysts, simpler synthesis method, mild conditions, less side reactions and low cost.

IMPROVED PROCESS FOR THE MANUFACTURE OF BEPOTASTINE AND ITS BESILATE SALT

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, (2019/05/02)

The present invention discloses a process for preparation of Bepotastine and its Besilate salt of formula I with good yield and purity. The invention also describes a process for recycle and reuse of the Ethyl-4-hydroxy piperidine-1-carboxylate from the aqueous medium after isolating the 2-[(S)-(4-Chlorophenyl)(piperidin-4- yloxy)methyl]pyridine, for subsequent batches in the production of Ethyl 4-[(4- Chlorophenyl)(pyridin-2-yl)methoxy]piperidine-1-carboxylate. The invention further discloses novel intermediates, viz., 2-[Chloro(4- chlorophenyl)methyl]pyridine hydrochloride and bis{2-[(S)-(4- Chlorophenyl)(piperidin-4-yloxy)methyl]pyridine} Dibenzoyl tartrate, useful in the preparation of Bepotastine and its Besilate salt.

A stable besylate bepotastine crystal and its preparation method

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Paragraph 0054-0055, (2018/02/04)

The invention discloses a stable bepotastine besilate crystal in novel crystal form through a recrystallization method. The obtained bepotastine besilate crystal is confirmed through X-ray powder diffraction and infrared spectrum. Stability contrast experiments prove that the provided bepotastine besilate crystal has extremely high stability, and both bulk drug and preparation of the bepotastine besilate crystal have stability obviously better than that of existing bepotastine besilate crystals.

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