330203-27-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 330203-27-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,0,2,0 and 3 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 330203-27:
(8*3)+(7*3)+(6*0)+(5*2)+(4*0)+(3*3)+(2*2)+(1*7)=75
75 % 10 = 5
So 330203-27-5 is a valid CAS Registry Number.
330203-27-5Relevant articles and documents
Enantiopure 1-phosphanorbornadiene-2-carboxaldehydes
Lelievre, Stephane,Mercier, Francois,Ricard, Louis,Mathey, Francois
, p. 4601 - 4608 (2007/10/03)
The reaction of phenylpropargyl aldehyde diethyl acetal with 1-phenyl-3,4-dimethylphosphole at 140°C or 1,2,5-triphenylphosphole at 170°C leads, after deprotection, to the corresponding 1-phosphanorbornadiene-2-carboxaldehydes 3 and 4 in 88 and 45% yields
