155644-43-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 155644-43-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,6,4 and 4 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 155644-43:
(8*1)+(7*5)+(6*5)+(5*6)+(4*4)+(3*4)+(2*4)+(1*3)=142
142 % 10 = 2
So 155644-43-2 is a valid CAS Registry Number.
155644-43-2Relevant articles and documents
Cycloaddition Reactions of Neat Dipivaloylketene
Kappe, C. Oliver,Wentrup, Curt,Kollenz, Gert
, p. 1133 - 1142 (1993)
Various hetero-Diels-Alder cycloaddition reactions of dipivaloylketene (2) with polarized multiple bond systems are described.Aldehydes and ketones react with 2 to furnish 1,3-dioxin-4-ones 7, imines and heterocumulenes (X=C=N) form 1,3-oxazin-4-o