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77868-25-8

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77868-25-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77868-25-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,6 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 77868-25:
(7*7)+(6*7)+(5*8)+(4*6)+(3*8)+(2*2)+(1*5)=188
188 % 10 = 8
So 77868-25-8 is a valid CAS Registry Number.

77868-25-8Relevant articles and documents

Studies in Rearrangement of 2-(Arylthio)benzohydroxamic Acids to the Corresponding 2-(Arylsulphinyl)benzamides

Dhareshwar, G. P.,Chhaya, P. N.,Hosangadi, B. D.

, p. 831 - 835 (2007/10/02)

2-(2'-Methoxyphenylthio)-(III)-, 2-(4'-methoxyphenylthio)-(IV)-, 2-(2'-methylphenylthio)-(V)- and 2-(4'-methylphenylthio)-(VI)-benzohydroxamic acids on treatment with polyphosphoric acid yield 2-(2'-methoxyphenylsulphinyl)-(VII)-, 2-(4'-methoxyphenylsulphinyl)-(VIII)-, 2-(2'-methylphenylsulphinyl)-(IX)- and 2-(4'-methylphenylsulphinyl)-(X)-benzamides respectively, illustrating the generality of rearrangement reported earlier .The rearrangement can also be effected with other reagents like xylene-P2O5, perchloric acid- gl. acetic acid and trifluoracetic acid. 2-Methylthiobenzohydroxamic acid (XI) and 4-(phenylthio)benzohydroxamic acid (XII) when treated with PPA yield benzothiazolone (XIII) and 4-aminodiphenyl sulphide (XIV).Experimental evidence has been presented which points to a concerted mechanism for the intramolecular oxygen transfer.

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