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159979-15-4

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159979-15-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 159979-15-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,9,7 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 159979-15:
(8*1)+(7*5)+(6*9)+(5*9)+(4*7)+(3*9)+(2*1)+(1*5)=204
204 % 10 = 4
So 159979-15-4 is a valid CAS Registry Number.

159979-15-4Downstream Products

159979-15-4Relevant articles and documents

Synthesis of the oxindole alkaloid (-)-Horsfiline

Pellegrini,Strassler,Weber,Borschberg

, p. 1979 - 1992 (1994)

A synthesis of (-)-horsfiline ((-)-1), a metabolite isolated recently from Horsfieldia syperba, is described. The diastereoface selectivity of the crucial oxidative rearrangement of chiral tetrahydro-β-carboline precursors into the corresponding oxindoles was investigated in some detail and found to depend critically on the substitution pattern of the aliphatic amino group. These findings were exploited for the preparation of(-)-1, as well as of the unnatural optical antipode (+)-1, starting from 5-hydroxy-L-tryptophan as the single source from the chiral pool.

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