133545-68-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133545-68-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,5,4 and 5 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 133545-68:
(8*1)+(7*3)+(6*3)+(5*5)+(4*4)+(3*5)+(2*6)+(1*8)=123
123 % 10 = 3
So 133545-68-3 is a valid CAS Registry Number.
133545-68-3Relevant articles and documents
SYNTHESIS OF (+/-)-α-CHAMIGRENE
Plamondon, Josee,Canonne, Persephone
, p. 589 - 592 (1991)
Regiospecific spiroalkylation of the selectively generated enolate arising from the 1,4-addition of lithium dimethylcuprate to 3-methylcyclohex-2-en-1-one allows an efficient preparation of spiroketones, including a key intermediate for the synthesis of (+/-)-α-Chamigrene.
