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20808-13-3

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20808-13-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20808-13-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,0 and 8 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20808-13:
(7*2)+(6*0)+(5*8)+(4*0)+(3*8)+(2*1)+(1*3)=83
83 % 10 = 3
So 20808-13-3 is a valid CAS Registry Number.

20808-13-3Relevant articles and documents

α-Fluorination of methyl phenyl sulfoxide and related compounds by molecular fluorine: A novel method for the introduction of fluorine into sulfoxides bearing α-H atoms

Toyota, Akemi,Ono, Yoshinori,Chiba, Jun,Sugihara, Takumichi,Kaneko, Chikara

, p. 703 - 708 (1996)

Direct formation of α-fluorosulfones from sulfoxides bearing α-H atoms merely by reaction with molecular fluorine (5% F2/N2) is reported, and a novel non-Pummerer-type mechanism is proposed for this α-fluorination reaction.

NUCLEOPHILIC REACTIONS AT A VINYLIC CENTER XXIV. REACTION OF FLUOROBROMOVINYL SULFONES WITH SODIUM ALKOXIDES AND ARENETHIOLATES

Shainyan, B. A.,Vitkovskii, V. Yu.,Azarov, A. G.

, p. 1366 - 1371 (2007/10/02)

The reactivity of fluorobromo-containing vinyl sulfones in reactions with sodium alkoxides and arenethiolates was investigated.Depending on the structure of the halogenovinyl sulfone, the products from substitution of the halogen atoms and/or sulfonyl group are formed in the reaction with the sodium alkoxides.The order of substitution when several groups are substituted was determined.Nucleophilic vinylic substitution and halogenophilic reduction occur in the reactions with arenethiolates.

Chemistry of Novel Compounds with Multifunctional Carbon Structure. Part 3. Synthesis of α-Azido-α-fluoro-α-(phenylthio and ethylthio)acetates

Takeuchi, Yoshio,Asahina, Masahiro,Hori, Kozo,Koizumi, Toru

, p. 1149 - 1154 (2007/10/02)

The synthesis of tri- and tetra-functional carbon compounds which possess three or four different functional groups on the same carbon atom is described.Reactions of ethyl bromofluoro- or chlorofluoro-acetate (4b) or (5) with several heteroaromatic nucleo

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