137809-77-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137809-77-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,8,0 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 137809-77:
(8*1)+(7*3)+(6*7)+(5*8)+(4*0)+(3*9)+(2*7)+(1*7)=159
159 % 10 = 9
So 137809-77-9 is a valid CAS Registry Number.
137809-77-9Relevant academic research and scientific papers
New route to (-)-frontalin and (-)-malyngolide via epoxyketone rearrangement
Asaoka, Morio,Hayashibe, Satoshi,Sonoda, Syuzo,Takei, Hisashi
, p. 6967 - 6974 (2007/10/02)
Synthesis of the title compounds by utilizing BF3·Et2O catalyzed ring contraction of 2,3-epoxycyclohexanones leading to 2-alkyl-2-formylcyclopentanones is described.
