143208-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143208-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,2,0 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 143208-81:
(8*1)+(7*4)+(6*3)+(5*2)+(4*0)+(3*8)+(2*8)+(1*1)=105
105 % 10 = 5
So 143208-81-5 is a valid CAS Registry Number.
143208-81-5Relevant articles and documents
A ROUTE TO 1-AZASPIRANS RELATED TO PERHYDROHISTRIONICOTOXIN
Thompson, Charles M.
, p. 979 - 990 (2007/10/02)
Described herein is a brief synthetic approach to 1-azaspirans.The key transformations in the sequence, starting from 2-cyclohexenone, employ a chelation-assisted regiochemical ring opening of an epoxide and the Lewis acid promoted, bishomoenolate dianion
