27933-89-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 27933-89-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,9,3 and 3 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 27933-89:
(7*2)+(6*7)+(5*9)+(4*3)+(3*3)+(2*8)+(1*9)=147
147 % 10 = 7
So 27933-89-7 is a valid CAS Registry Number.
27933-89-7Relevant articles and documents
A MILD METHOD FOR THE SYNTHESIS OF 2-KETOPYRROLES FROM CARBOXYLIC ACIDS
Nicolaou, K. C.,Claremon, D. A.,Papahatjis, D. P.
, p. 4647 - 4650 (2007/10/02)
A mild method for the synthesis of 2-ketopyrroles from carboxylic acids via 2-pyridylthiolesters and pyrrylmagnesium chloride is described.