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157117-30-1

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157117-30-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157117-30-1 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, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 157117-30:
(8*1)+(7*5)+(6*7)+(5*1)+(4*1)+(3*7)+(2*3)+(1*0)=121
121 % 10 = 1
So 157117-30-1 is a valid CAS Registry Number.

157117-30-1Downstream Products

157117-30-1Relevant articles and documents

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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