287199-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 287199-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,7,1,9 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 287199-81:
(8*2)+(7*8)+(6*7)+(5*1)+(4*9)+(3*9)+(2*8)+(1*1)=199
199 % 10 = 9
So 287199-81-9 is a valid CAS Registry Number.
287199-81-9Relevant academic research and scientific papers
A new route to spirooxindoles.
Hilton,Ho,Pljevaljcic,Jones
, p. 2639 - 2641 (2007/10/03)
[reaction: see text]Reaction of indole amides 5 with tributylstannane gave spiroindolenines 9 which are readily converted into spiropyrrolidinyloxindoles. This tricyclic system is found in a number of interesting natural products.
