13507-49-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 13507-49-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,5,0 and 7 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 13507-49:
(7*1)+(6*3)+(5*5)+(4*0)+(3*7)+(2*4)+(1*9)=88
88 % 10 = 8
So 13507-49-8 is a valid CAS Registry Number.
13507-49-8Relevant articles and documents
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Patai,Schwartz
, p. 1232,1233 (1960)
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A SHORT SYNTHESIS OF THE Δ1-CARBOPENEM RING SYSTEM
Venugopalan, B.,Hamlet, A. Bevin,Durst, Tony
, p. 191 - 194 (2007/10/02)
Michael addition of N-lithio-4-vinyl-azetidin-2-one to several vinyl phosphonates gave adducts which were converted to Δ1-carbopenems via ozonolysis and an intramolecular Horner-Wittig reaction.
