81609-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81609-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,0 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81609-18:
(7*8)+(6*1)+(5*6)+(4*0)+(3*9)+(2*1)+(1*8)=129
129 % 10 = 9
So 81609-18-9 is a valid CAS Registry Number.
81609-18-9Relevant academic research and scientific papers
REGIOSELECTIVE C-3 ALKYLATIONS OF OXINDOLE DIANION
Kende, Andrew, S.,Hodges, John C.
, p. 1 - 10 (2007/10/02)
Oxindole is converted to its dianion by treatment with two equivalents each of n-BuLi and TMEDA.Alkylations with a number of common electrophiles define the scope of synthetically useful tramsformations leading to 3-monosubstituted and 3,3-disubstituted o
