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690997-06-9

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690997-06-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 690997-06-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,0,9,9 and 7 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 690997-06:
(8*6)+(7*9)+(6*0)+(5*9)+(4*9)+(3*7)+(2*0)+(1*6)=219
219 % 10 = 9
So 690997-06-9 is a valid CAS Registry Number.

690997-06-9Relevant articles and documents

Synthesis and Diels-Alder reactions of 9-(4-benzyloxazolin-2-yl) anthracene

Bawa, Ramadan A.,Jones, Simon

, p. 2765 - 2770 (2004)

The synthesis of 9-(4-benzyloxazolin-2-yl)anthracene is described employing a new approach for the cyclisation of β-hydroxy amides to oxazolines. Thermal Diels-Alder reactions with N-methyl maleimide were found to be considerably slower than those previously observed. Essentially no diastereoselectivity was observed in these reactions as the benzyl stereodirecting group is remote from the reactive site. Minor rate enhancements were noticeable in the presence of some added Lewis acids, but with no diastereoselection.

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