159898-42-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 159898-42-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,8,9 and 8 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 159898-42:
(8*1)+(7*5)+(6*9)+(5*8)+(4*9)+(3*8)+(2*4)+(1*2)=207
207 % 10 = 7
So 159898-42-7 is a valid CAS Registry Number.
159898-42-7Relevant articles and documents
A short synthesis of (+)-tortuosamine
Goehring
, p. 8145 - 8146 (2007/10/02)
A four-step synthesis of (±)-tortuosamine (1) is described. The key ring closure was an intramolecular S(RN)1 reaction between a ketone enolate and a 2-halopyridine.
