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313959-45-4

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313959-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 313959-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,3,9,5 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 313959-45:
(8*3)+(7*1)+(6*3)+(5*9)+(4*5)+(3*9)+(2*4)+(1*5)=154
154 % 10 = 4
So 313959-45-4 is a valid CAS Registry Number.

313959-45-4Relevant articles and documents

HETEROCYCLIC SYNTHESES VIA CARBANIONICALLY INDUCED REARRANGEMENT REACTIONS

Hellwinkel, Dieter,Lenz, Ruediger,Lammerzahl, Frank

, p. 2073 - 2084 (2007/10/02)

The easily occuring -migrations of sulfonyl and carbonyl functions to neighboring phenyl anions can be utilized for ring expansions by one benzo unit when suitably tailored precursor heterocycles are used.Thus, the 1,2- benzisothiazol dioxide systems 8 and 17 can be transformed into dibenzothiazepin dioxides 12 and 21, respectively, whereas the dibenzo- and 1,2,4-benzothiazin dioxide models 35 and 46 give rise to the tribenzothiazocin dioxide and dibenzothiadiazocin dioxide systems 38 and 47, respectively.Unexpected formations of heterocyclic systems, namely, spirobenzoxazin-5,1'(3H)-isobenzofuran> 55, 3,1-benzoxazin 62, and phenanthridinium-salt 70 took place when phtalimide 52, dibenzoylaniline 56, and biphenylylbenzamide 65 were reacted with t-BuLi.

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