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127966-47-6

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127966-47-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127966-47-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,9,6 and 6 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 127966-47:
(8*1)+(7*2)+(6*7)+(5*9)+(4*6)+(3*6)+(2*4)+(1*7)=166
166 % 10 = 6
So 127966-47-6 is a valid CAS Registry Number.

127966-47-6Relevant articles and documents

A preparing method of a penem medicine mercaptan branch chain

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, (2016/10/27)

A preparing method of a penem medicine mercaptan branch chain is disclosed. The method includes reacting an intermediate that is (2S,4R)-4-(3-fluorophenylthio)pyrrolidine-2-carboxylic acid with a fluorizating agent to prepare a mercaptan intermediate that is (2S,4S)-4-mercaptopyrrolidine-2-carboxylic acid, and performing amino protection and carboxyl amidation to obtain the penem medicine mercaptan branch chain that is (2S,4S)-1-p-nitrobenzyloxycarbonyl-2-(N,N-dimethylaminoacyl)-4-mercaptopyrrolidine. Compared with the prior art, the method omits a hydroxy protection step in mercaptan preparation, simplifies the synthesis route, and is high in yield, low in cost and suitable for large-scale industrial production.

Carbapenems, their preparation and use the synthesis of carbapenems

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Page/Page column 7; 9, (2008/06/13)

Pyrrolidine compound (V), in free or salt form, is new. Pyrrolidine compound of formula (V), in free or salt form, is new. Independent claims aren also included for: (1) the preparation of (V); (2) the preparation of 3-[(3S,5S)-5-carbamido-3-pyrrolidinyl]-thio substituted carbapenem compound of formula (II) comprising reaction of (V) with an amine compound of formula (NH(R1)(R2)) to give a pyrrolidine compound of formula (III); and elimination of p-nitrobenzyl- and/or p-nitrobenzylcarbonyl-protection groups from (III); and (3) preparation of a pharmaceutical composition of (II) comprising mixing (II) with solvents or auxiliary materials. Either R1, R2alkyl, H, aryl or heterocyclyl; or NR1R25-8 membered optionally saturated heterocyclic group (optionally substituted). [Image] [Image].

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