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178999-23-0

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178999-23-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 178999-23-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,9,9 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 178999-23:
(8*1)+(7*7)+(6*8)+(5*9)+(4*9)+(3*9)+(2*2)+(1*3)=220
220 % 10 = 0
So 178999-23-0 is a valid CAS Registry Number.

178999-23-0Relevant articles and documents

Novel synthesis of benzothiazole derivatives via directed lithiation and aryne-mediated cyclization followed by quenching with electrophiles

Stanetty, Peter,Krumpak, Barbara

, p. 5130 - 5133 (2007/10/03)

A series of benzothiazole derivatives selectively functionalized at position 7 was synthesized in the course of the following one-pot reaction sequence: directed lithiation of 2,2-dimethyl-N-(3-halophenyl)propanethioamides (1, 2) or N-(3-halophenyl)-tert-butylthionocarbamates (15-17), cyclization of the aryne intermediate, and quenching of the resulting aryllithium with selected electrophiles.

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