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287976-89-0

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287976-89-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 287976-89-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,7,9,7 and 6 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 287976-89:
(8*2)+(7*8)+(6*7)+(5*9)+(4*7)+(3*6)+(2*8)+(1*9)=230
230 % 10 = 0
So 287976-89-0 is a valid CAS Registry Number.

287976-89-0Relevant articles and documents

Isolation, reactivity and intramolecular trapping of phosphazide intermediates in the Staudinger reaction of tertiary phosphines with azides

Desamparados Velasco,Molina, Pedro,Fresneda, Pilar M.,Sanz, Miguel A.

, p. 4079 - 4084 (2000)

The Staudinger reaction of the N-substituted o-azidobenzamide 1 with triphenylphosphine or diphenylmethylphosphine allows the isolation of the intermediate phosphazides as crystalline solids, which have been characterized by spectroscopic methods. These compounds react in aza Wittig type fashion with isocyanates to give unexpectedly the corresponding 1,2,3- benzotriazinone derivative. Trapping of a Z-phosphazide by intramolecular aza Wittig reaction is reported for the first time. (C) 2000 Elsevier Science Ltd.

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