23949-29-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23949-29-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,9,4 and 9 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 23949-29:
(7*2)+(6*3)+(5*9)+(4*4)+(3*9)+(2*2)+(1*9)=133
133 % 10 = 3
So 23949-29-3 is a valid CAS Registry Number.
23949-29-3Relevant articles and documents
Efficient Synthesis of 3-Arylphthalides
Godbole, Himanshu M.,Joseph, Augustine R.
, p. 332 - 333 (2007/10/03)
A convenient method for the synthesis of 3-arylphthalodes (3a-q) involving condensation of phthalaldehydric acids (1a,b) with aromatic substrates (2a-k) in the presence of TFA is described.