207731-43-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 207731-43-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,7,7,3 and 1 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 207731-43:
(8*2)+(7*0)+(6*7)+(5*7)+(4*3)+(3*1)+(2*4)+(1*3)=119
119 % 10 = 9
So 207731-43-9 is a valid CAS Registry Number.
207731-43-9Relevant articles and documents
Synthesis of β-keto Fischer carbene complexes
Merlic, Craig A.,Wu, Feng
, p. 183 - 191 (2007/10/03)
The synthesis of β-keto Fischer carbene complexes is reported. Deprotonation of alkyl Fischer carbene complexes followed by acylation of the resulting metal enolates with acid chlorides yielded β-keto carbene complexes in yields up to 50%. The complexes w
