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306971-59-5

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306971-59-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 306971-59-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,6,9,7 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 306971-59:
(8*3)+(7*0)+(6*6)+(5*9)+(4*7)+(3*1)+(2*5)+(1*9)=155
155 % 10 = 5
So 306971-59-5 is a valid CAS Registry Number.

306971-59-5Downstream Products

306971-59-5Relevant articles and documents

Radical cyclisation reactions leading to polycyclics related to the amaryllidaceae and erythrina alkaloids

Parsons, Andrew F,Williams, David A.J

, p. 7217 - 7228 (2007/10/03)

Novel radical cyclisation reactions, mediated by tributyltin hydride, samarium(II) iodide or manganese(III) acetate, have been explored to form tri- and tetra-cyclic ring systems related to the Amaryllidaceae or Erythrina family of alkaloids. Haloethanamide precursors possessing a cyclohexenone ring have been shown to form octahydroindolones, and erythrinane-type systems can be formed from precursors bearing unsaturated side-chains in tandem cyclisations. An octahydroindolone has been converted to the ring skeleton of γ-lycorane using samarium(II) iodide while reaction with manganese(III) acetate has been shown to yield a novel tetracyclic ring system bearing a 7-membered ring. Finally, a new tandem cyclisation of a cyclohexenone aryl halide has been shown to provide a quick approach to a 5,5,6,6-tetracycle related to erythrinane natural products. (C) 2000 Elsevier Science Ltd.

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