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219821-37-1

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219821-37-1 Usage

General Description

The chemical "2-[2-[(2R,3S)-2-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethoxy]-3-(4-fluorophenyl)-4-morpholinyl]-1-iminoethyl]hydrazinecarboxylic acid methyl ester" is a complex organic compound with a long, intricate molecular structure. It contains a hydrazinecarboxylic acid methyl ester group and various functional groups such as trifluoromethyl, phenyl, ethoxy, fluorophenyl, and morpholinyl. The compound is likely to have a wide range of chemical and biological properties due to the presence of these different groups. Its specific uses and effects would depend on the context and applications in which it is used, such as in pharmaceuticals, agrochemicals, or materials science.

Check Digit Verification of cas no

The CAS Registry Mumber 219821-37-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,8,2 and 1 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 219821-37:
(8*2)+(7*1)+(6*9)+(5*8)+(4*2)+(3*1)+(2*3)+(1*7)=141
141 % 10 = 1
So 219821-37-1 is a valid CAS Registry Number.

219821-37-1Relevant articles and documents

Method for preparing intermediate of the Fosaprepitant

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Paragraph 0017; 0030-0039, (2018/05/16)

The invention discloses a method for preparing an intermediate of the Fosaprepitant, and specifically relates to a new method for preparing a drug 5-[[(2R,3S)-2-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl] ethoxy]-3-(4-fluorophenyl)-4-morpholinyl]methyl]-1,2-dihydro-3H-1,2,4-triazole-3-one, i.e., Aprepitant. The method comprises the steps of: synthesizing a compound (IV) in the presence of a condensation system, and then performing cyclization on the compound (IV) at 139 DEG C or below to obtain the target compound (I). The preparation method is green, environmentally friendly and efficient and has easy industrialization.

A kind of preparation method of dimethyl luck Sha Pitan cyclophosphadenosine

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Paragraph 0042-0044, (2017/04/07)

The invention relates to a method for preparing fosaprepitant. The fosaprepitant is shown as a formula (I). The method comprises steps 1, 2, 3 and 4, finally, a compound shown as the formula (I) is obtained through hydrogenation reduction; in the step 1, a compound in a formula (II) reacts with a Grignard reagent to generate a compound shown as a formula (III) in the presence of palladium carbon and ammonium formate. The method for preparing is simple in production step, has high reaction yield and less side products, is easy in control of the reaction conditions and is suitable for medical industrial production.

A METHOD OF PREPARING 3- ( ( (2R, 3S) -2- ( (R) -1- (3, 5 -BIS (TRIFLUOROMETHYL) PHENYL) ETHOXY) -3 - (4 - FLUOROPHENYL) MORPHOLINO) METHYL) - 1H- 1, 2, 4 -TRIAZOL- 5 (4H) -ONE (APREPITANT) IN POLYMORPH FORM I OR II

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Page/Page column 6; 7, (2013/09/26)

The present solution relates to a method of preparing aprepitant of formula (1) in the desired crystalline form II or I, wherein the intermediate of formula (12) is extracted with a water immiscible high-boiling solvent selected from an alcohol, ester or ketone and, after washing with water and/or brine, the solution is heated up to the boiling point of the given solvent, which results in cyclization to aprepitant, and, after cooling, the produced aprepitant is isolated.

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