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99857-70-2

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99857-70-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99857-70-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,5 and 7 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99857-70:
(7*9)+(6*9)+(5*8)+(4*5)+(3*7)+(2*7)+(1*0)=212
212 % 10 = 2
So 99857-70-2 is a valid CAS Registry Number.

99857-70-2Relevant articles and documents

Microwave-assisted silica-supported aluminum chloride-catalyzed Friedel-Crafts alkylation

Zupp, Laurine R.,Campanella, Veronica L.,Rudzinski, Diandra M.,Beland, Franois,Priefer, Ronny

, p. 5343 - 5346 (2012)

Microwave irradiation is a popular method in organic synthesis to achieve high yields in shorter reaction times. This decreases total 'man-hours' in a synthetic setting. Another technique used in organic chemistry to decrease manual manipulations, is solid support reagents. The benefits of this approach is that upon completion of a reaction, a simple filtration can be performed which expedites the work-up and also produces less organic waste. Friedel-Crafts alkylation has been explored using microwave chemistry as well as with solid-supported reagents. In comparison with traditional heating, as well as with AlCl3, superior yields were observed with silica-gel bound aluminum chloride (Si-AlClx) when microwave irradiated for only 5 min.

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