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857570-90-2

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857570-90-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857570-90-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,5,7 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 857570-90:
(8*8)+(7*5)+(6*7)+(5*5)+(4*7)+(3*0)+(2*9)+(1*0)=212
212 % 10 = 2
So 857570-90-2 is a valid CAS Registry Number.

857570-90-2Relevant academic research and scientific papers

Dynamic stereochemistry transfer in a transannular aldol reaction: Total synthesis of hypocrellin A

O'Brien, Erin M.,Morgan, Barbara J.,Kozlowski, Marisa C.

, p. 6877 - 6880 (2008)

(Chemical Equation Presented) A dynamic approach: The key step in the total synthesis of hypocrellin A involves a potentially biomimetic 1,8-diketone aldol reaction, which constructs the seven-membered ring. The helical configuration is established first

Perylenequinone natural products: Total syntheses of the diastereomers (+)-phleichrome and (+)-calphostin D by assembly of centrochiral and axial chiral fragments

Morgan, Barbara J.,Mulrooney, Carol A.,O'Brien, Erin M.,Kozlowski, Marisa C.

supporting information; experimental part, p. 30 - 43 (2010/04/26)

(Chemical Equation Presented) The first total synthesis of (+)-calphostin D and the total synthesis of (+)-phleichrome are outlined. The convergent syntheses utilize an enantiopure biaryl common intermediate, which is formed via an enantioselective cataly

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