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127680-54-0

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127680-54-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127680-54-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,6,8 and 0 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 127680-54:
(8*1)+(7*2)+(6*7)+(5*6)+(4*8)+(3*0)+(2*5)+(1*4)=140
140 % 10 = 0
So 127680-54-0 is a valid CAS Registry Number.

127680-54-0Relevant articles and documents

A NOVEL SYNTHESIS OF THE 1β-METHYLCARBAPENEM KEY INTERMEDIATE EMPLOYING THE -CYCLOADDITION REACTION OF CHLOROSULFONYL ISOCYANATE WITH A 4H-1,3-DIOXIN DERIVATIVE

Ito, Yoshio,Kobayashi, Yuko,Terashima, Shiro

, p. 5631 - 5634 (1989)

A highly stereoselective synthetic route to the title compound was explored by featuring the -cycloaddition reaction of chlorosulfonyl isocyanate with the 4H-1,3-dioxin derivative readily obtainable from methyl (R)-3-hydroxybutyrate, the Baeyer-Villinger reaction resulting in novel cleavage of the acetal moiety, and the Reformatsky reaction with sterically crowded 3-(2-bromopropionyl)-2-oxazolidone derivatives.

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