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857665-65-7

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857665-65-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857665-65-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,6,6 and 5 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 857665-65:
(8*8)+(7*5)+(6*7)+(5*6)+(4*6)+(3*5)+(2*6)+(1*5)=227
227 % 10 = 7
So 857665-65-7 is a valid CAS Registry Number.

857665-65-7Relevant articles and documents

Conversion of alcohols to alkyl aryl sulfides by a new type of oxidation-reduction condensation using phenyl diphenylphosphinite

Kuroda, Kiichi,Maruyama, Yuji,Hayashi, Yujiro,Mukaiyama, Teruaki

, p. 381 - 392 (2009)

Preparation of alkyl aryl sulfides from alcohols and arenethiols such as 2-sulfanyl-1,3-benzothiazole (BtzSH) is described by a new type of oxidation-reduction condensation using phenyl diphenylphosphinite (PhOPPh 2) and benzoquinone derivatives or azide compounds. This reaction proceeds under mild and neutral conditions and is applicable to the thioetherification of various alcohols in which the chiral secondary and tertiary alcohols are converted into the corresponding chiral sulfides with almost complete inversion of configuration.

Preparation of tert-Alkyl aryl sulfides from tert-alcohols via quinone-mediated oxidation-reduction condensation between tert-Alkyl diphenylphosphinites and 2-sulfanyl-1,3-benzothiazole

Ikegai, Kazuhiro,Pluempanupat, Wanchai,Mukaiyama, Teruaki

, p. 638 - 639 (2007/10/03)

A convenient two-step procedure for the construction of sulfur-containing quaternary centers from tert-alcohols involving chiral ones is established. tert-Alkyl diphenylphosphinites 1 were easily prepared in excellent yields from tert-alcohols and ClPPhs

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