5659-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5659-20-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,5 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 5659-20:
(6*5)+(5*6)+(4*5)+(3*9)+(2*2)+(1*0)=111
111 % 10 = 1
So 5659-20-1 is a valid CAS Registry Number.
5659-20-1Relevant academic research and scientific papers
Reactions with Phosphine Alkylenes, XLIII. A General Synthesis for α-Branched β-Ketocarboxylic Acid Anilides
Bestmann, Hans Juergen,Kumar, Kammlesh
, p. 2708 - 2710 (2007/10/02)
α-Acylphosphonium ylides 5 react with phenylisocyanate (7) with formation of α-acylketeneimines 8 which can be hydrolysed to α-branched β-ketocarboxylic acid anilides 9.
