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223787-86-8

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223787-86-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 223787-86-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,7,8 and 7 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 223787-86:
(8*2)+(7*2)+(6*3)+(5*7)+(4*8)+(3*7)+(2*8)+(1*6)=158
158 % 10 = 8
So 223787-86-8 is a valid CAS Registry Number.

223787-86-8Downstream Products

223787-86-8Relevant articles and documents

A novel acylative ring cleavage of benzothieno[3,2-b]pyran-4-ols: Application to the synthesis of dibenzothiophenes and fused-ring derivatives

Gabbutt, Christopher D.,Hepworth, John D.,Heron, B. Mark,Thomas, Jean-Luc

, p. 541 - 542 (2007/10/03)

The benzothienopyranols 3, readily available from the ketone 1, are transformed to the carbamates 5 on treatment with N,N-dimethylcarbamoyl chloride, subsequent thermal electrocyclisation provides access to dibenzothiophene derivatives 6 and 11-13.

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