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294637-52-8

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294637-52-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 294637-52-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,9,4,6,3 and 7 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 294637-52:
(8*2)+(7*9)+(6*4)+(5*6)+(4*3)+(3*7)+(2*5)+(1*2)=178
178 % 10 = 8
So 294637-52-8 is a valid CAS Registry Number.

294637-52-8Relevant articles and documents

Unified Strategy to Amphenicol Antibiotics: Asymmetric Synthesis of (-)-Chloramphenicol, (-)-Azidamphenicol, and (+)-Thiamphenicol and Its (+)-3-Floride

Liu, Jinxin,Li, Yaling,Ke, Miaolin,Liu, Minjie,Zhan, Pingping,Xiao, You-Cai,Chen, Fener

, p. 15360 - 15367 (2020/11/30)

The asymmetric synthesis of (-)-chloramphenicol, (-)-azidamphenicol, and (+)-thiamphenicol and its (+)-3-floride, (+)-florfenicol, is reported. This approach toward the amphenicol antibiotic family features two key steps: (1) a cinchona alkaloid derived urea-catalyzed aldol reaction allows highly enantioselective access to oxazolidinone gem-diesters and (2) a continuous flow diastereoselective decarboxylation of thermally stable oxazolidinone gem-diesters to form the desired trans-oxazolidinone monoesters with two adjacent stereocenters that provide the desired privileged scaffolds of syn-vicinal amino alcohols in the amphenicol family.

A short enantioselective synthesis of (-)-chloramphenicol and (+)-thiamphenicol using tethered aminohydroxylation

George, Shyla,Narina, Srinivasarao V.,Sudalai, Arumugam

, p. 10202 - 10207 (2007/10/03)

An efficient enantioselective synthesis of (-)-chloramphenicol (1) and (+)-thiamphenicol (2) is described. These antibiotics have been synthesized from commercially available 4-nitrobenzaldehyde and 4-(methylthio)benzaldehyde, respectively, using tethered aminohydroxylation and Sharpless asymmetric epoxidation as the chirality inducing steps.

Synthetic applications of the cyclic iminocarbonate rearrangement Enantioselective syntheses of chloramphenicol and 4-epi-cytoxazone

Park, Jung Nam,Ko, Soo Y.,Koh, Hun Y.

, p. 5553 - 5556 (2007/10/03)

Chloramphenicol and 4-epi-cytoxazone have been enantioselectively synthesized using the asymmetric dihydroxylation and the cyclic iminocarbonate rearrangement as key steps. (C) 2000 Elsevier Science Ltd.

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