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Methanesulfonic acid (1R,2S)-2-[(4S,5S)-4-(tert-butyl-diphenyl-silanyloxymethyl)-2-phenyl-4,5-dihydro-oxazol-5-yl]-2-hydroxy-1-hydroxymethyl-ethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

157117-20-9

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157117-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157117-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,1,1 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 157117-20:
(8*1)+(7*5)+(6*7)+(5*1)+(4*1)+(3*7)+(2*2)+(1*0)=119
119 % 10 = 9
So 157117-20-9 is a valid CAS Registry Number.

157117-20-9Relevant academic research and scientific papers

Regio- and stereocontrolled synthesis ofD-erythrosphingosine and phytosphingosine fromDglucosamine

Murakami, Teiichi,Minamikawa, Hiroyuki,Hato, Masakatsu

, p. 745 - 748 (2007/10/02)

D-erythro-Sphingosine (1) and phytosphingosine (2) have been efficiently synthesized from D-glucosamine by utilizing its whole carbon skeleton and functional groups. In this synthetic route, regioselective alkylation of the epoxy-tosylate 9 was achieved with a copper(I)-catalyzed Grignard reagent to give the key intermediate 10, which was converted to both 1 and 2 via regioselective formation of the iodohydrin 11.

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