20052-00-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20052-00-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,0,5 and 2 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20052-00:
(7*2)+(6*0)+(5*0)+(4*5)+(3*2)+(2*0)+(1*0)=40
40 % 10 = 0
So 20052-00-0 is a valid CAS Registry Number.
20052-00-0Relevant articles and documents
Reactions with Phosphine Alkylenes, 44. A Further Synthesis of (Z)-α,β-Unsaturated Aldehydes
Bestmann, Hans Juergen,Ermann, Peter
, p. 3264 - 3266 (2007/10/02)
Reaction of phosphorus ylides 4, especially such with electron donating groups R, with the glyoxal semiacetal 5 leads Z-stereospecifically to the formation of the acetals 3, which can be cleaved to the (Z)-α,β-unsaturated aldehydes 6.