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208248-89-9

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208248-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 208248-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,8,2,4 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 208248-89:
(8*2)+(7*0)+(6*8)+(5*2)+(4*4)+(3*8)+(2*8)+(1*9)=139
139 % 10 = 9
So 208248-89-9 is a valid CAS Registry Number.

208248-89-9Downstream Products

208248-89-9Relevant articles and documents

Synthesis of variously substituted spirobenzocyclobutenes

Phansavath, Phannarath,Stammler, Robert,Aubert, Corinne,Malacria, Max

, p. 436 - 443 (1998)

The cobalt(I)-mediated cocyclization between bis(trimethylsilyl)ethyne and monocyclic diyne 8 led to new spirobenzocyclobutene 9. This quite stable compound was easily transformed into variously substituted spirobenzocyclobutenes which are versatile synthetic intermediates. The full details of the preparation of such compounds are presented.

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