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52567-56-3

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52567-56-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52567-56-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,5,6 and 7 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 52567-56:
(7*5)+(6*2)+(5*5)+(4*6)+(3*7)+(2*5)+(1*6)=133
133 % 10 = 3
So 52567-56-3 is a valid CAS Registry Number.

52567-56-3Relevant articles and documents

Enantioselective synthesis of α-ionone derivatives using an anti SN2′ substitution of functionalized zinc organometallics

Soorukram, Darunee,Knochel, Paul

, p. 2409 - 2411 (2007/10/03)

(Equation Presented) The allylic substitution of sterically hindered (2-iodocycloalkyl)phosphates proceeds with complete anti SN2′ stereoselectivity with mixed diorganozincs of the type RZnCH 2SiMe3 in the presence of CuCN·2LiCI. Only the group R of the copper-zinc reagent is transferred in the allylic substitution. This method was used to prepare odoriferous substances such as (R)-α-ionone in 97% ee and (R)-dihydro-α-ionone in 98% ee.

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