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77721-48-3

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77721-48-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77721-48-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,7,2 and 1 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 77721-48:
(7*7)+(6*7)+(5*7)+(4*2)+(3*1)+(2*4)+(1*8)=153
153 % 10 = 3
So 77721-48-3 is a valid CAS Registry Number.

77721-48-3Relevant articles and documents

Direct Azidation of Phenols

Kitamura, Mitsuru,Murakami, Kento,Koga, Tatsuya,Eto, Takashi,Ishikawa, Akihiro,Shimooka, Hirokazu,Okauchi, Tatsuo

, p. 5824 - 5827 (2019)

Direct azidation of phenols was developed. By treating chloroimidazolinium chloride 1b and sodium azide with phenol in the presence of a secondary amine in methoxyethanol, ortho-azidation of phenol was achieved.

ELECTROPHILIC AZIDIZING AGENT OR DIAZOTIZING AGENT

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Paragraph 0075-0078, (2019/07/31)

PROBLEM TO BE SOLVED: To provide a novel electrophilic azidizing agent that is safe without explosibility, capable of azidizing a nucleophilic compound in an electrophilic manner. SOLUTION: The present invention provides an azide imidazolium derivative re

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