457052-02-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 457052-02-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,5,7,0,5 and 2 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 457052-02:
(8*4)+(7*5)+(6*7)+(5*0)+(4*5)+(3*2)+(2*0)+(1*2)=137
137 % 10 = 7
So 457052-02-7 is a valid CAS Registry Number.
457052-02-7Relevant articles and documents
ACETALS AND KETALS OF 2-(2-PYRIDYL)PROPANE-1,3-DIOL NOVEL PROTECTION FOR CARBONYL GROUPS
Katritzky, Alan R.,Fan, Wei-Qiang,Li, Qiao-Ling
, p. 1195 - 1198 (2007/10/02)
Aldehydes and ketones are readily converted into the corresponding 1,3-dioxanes by treatment with 2-(2-pyridyl)propane-1,3-diol.The protective group is easily removed under mild base conditions after activation by quaternization with methyl iodide.
