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222539-28-8

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222539-28-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 222539-28-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,2,5,3 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 222539-28:
(8*2)+(7*2)+(6*2)+(5*5)+(4*3)+(3*9)+(2*2)+(1*8)=118
118 % 10 = 8
So 222539-28-8 is a valid CAS Registry Number.

222539-28-8Relevant articles and documents

New and Convenient Synthesis of (R)-(+)-4,5-Dihydro-4-methyl-2(3H)-furanone and (R)-(-)-4-Bromo-3-methyl-1-O-tert-butyldimethylsilylbutan-1-ol

Pemp, Alexander,Seifert, Karlheinz

, p. 65 - 68 (1999)

A convenient partial synthesis of the lactone (+)-10 is reported starting from the readily available methyl (S)-(+)-3-hydroxy-2-methylpropanoate (+)-1. Furthermore, an efficient three step route to the optically active saturated isoprene unit (-)-13 in high yield starting from the lactone (+)-10 is reported for the first time.

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