261949-65-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 261949-65-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,1,9,4 and 9 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 261949-65:
(8*2)+(7*6)+(6*1)+(5*9)+(4*4)+(3*9)+(2*6)+(1*5)=169
169 % 10 = 9
So 261949-65-9 is a valid CAS Registry Number.
261949-65-9Relevant articles and documents
Enantioselective synthesis of (+)-royleanone from sulfinyl quinones
Carreno, M. Carmen,Garcia Ruano, Jose L.,Toledo, Miguel A.
, p. 288 - 291 (2007/10/03)
A convergent enantioselective synthesis of (+)-royleanone (1) is described starting from enantiomerically pure (S)-3-hydroxy-2-isopropyl-5-tert-butylsulfinyl-p-benzoquinone, which is readily available from 3-isopropyl-1,2,4-trimethoxybenzene and 1,3,3-tri