136258-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136258-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,2,5 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 136258-89:
(8*1)+(7*3)+(6*6)+(5*2)+(4*5)+(3*8)+(2*8)+(1*9)=144
144 % 10 = 4
So 136258-89-4 is a valid CAS Registry Number.
136258-89-4Relevant academic research and scientific papers
β-Keto-δ-valerolactone: Synthesis and use as methylvinylketone anion equivalent in michael additions
D'Angelo, Jean,Gomez-Pardo, Domingo
, p. 3063 - 3066 (2007/10/02)
β-Keto-δ-valerolactone 11 was prepared from 3-butyn-l-ol 6 in 5 steps (50 % overall yield). This lactone was added to Michael acceptors 13, 17, 19 and 25, giving adducts 14, 18, 20 and 26 respectively.
