155203-64-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 155203-64-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,2,0 and 3 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 155203-64:
(8*1)+(7*5)+(6*5)+(5*2)+(4*0)+(3*3)+(2*6)+(1*4)=108
108 % 10 = 8
So 155203-64-8 is a valid CAS Registry Number.
155203-64-8Relevant articles and documents
Diastereo- and enantiocontrolled synthesis of (-)-allosedamine via cycloaddition of a chiral nitrone
Oppolzer,Tamura,Deerburg
, p. 554 - 560 (2007/10/02)
The piperidine alkaloid (-)-allosedamine (1) has been synthesized, in 21% overall yield, in nine steps starting from the formyl-ester 4. The synthesis features the reaction cascade 7 → 3 → 2, involving asymmetric electrophilic enolate hydroxyamination, hy