105970-34-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 105970-34-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,9,7 and 0 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 105970-34:
(8*1)+(7*0)+(6*5)+(5*9)+(4*7)+(3*0)+(2*3)+(1*4)=121
121 % 10 = 1
So 105970-34-1 is a valid CAS Registry Number.
105970-34-1Relevant articles and documents
Spirocyclic Sesquiterpene Synthesis via Quinone Methide Coupling Reactions. Anhydro-β-rotunol
Marx, John N.,Bih, Qoang-Rung
, p. 336 - 338 (1987)
A seven-step total synthesis of 1 is reported, starting with 3,5-dimethylphenol.Formylation with Zn(CN)2 gives 9.Mesylation of the derived alcohol 10 occurs only on the phenolic OH, to give 12.Coupling of this with the dilithium salt 15 of 2,3-dimethylbut