161988-78-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161988-78-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,9,8 and 8 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 161988-78:
(8*1)+(7*6)+(6*1)+(5*9)+(4*8)+(3*8)+(2*7)+(1*8)=179
179 % 10 = 9
So 161988-78-9 is a valid CAS Registry Number.
161988-78-9Relevant articles and documents
Total Synthesis of (+/-)-cis-Trikentrin A
Wiedenau, Paul,Monse, Barbara,Blechert, Siegfried
, p. 1167 - 1176 (2007/10/02)
Two patways towards the construction of the trikentrin skeleton are presented, one leading to the total synthesis of (+/-)-cis-Trikentrin A (1).The key step is the intramolecular Heck coupling of the triflate 21 to form the five-membered ring of the indenes 22 and 23.