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870553-45-0

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870553-45-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 870553-45-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,0,5,5 and 3 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 870553-45:
(8*8)+(7*7)+(6*0)+(5*5)+(4*5)+(3*3)+(2*4)+(1*5)=180
180 % 10 = 0
So 870553-45-0 is a valid CAS Registry Number.

870553-45-0Relevant articles and documents

Synthesis of chiral 1-substituted tetrahydroisoquinolines by the intramolecular 1,3-chirality transfer reaction catalyzed by Bi(OTf)3

Kawai, Nobuyuki,Abe, Ryuzou,Matsuda, Mika,Uenishi, Jun'Ichi

experimental part, p. 2102 - 2114 (2011/06/19)

The intramolecular 1,3-chirality transfer reaction of chiral amino alcohols 1 with 99% ee was developed to construct chiral 1-substituted tetrahydroisoquinoline 2. Bi(OTf)3 (10 mol %)-catalyzed cyclization of 1 (R = H) afforded (S)-1-(E)-propenyl tetrahydroisoquinoline 2 (R = H) in 83% yield with a ratio of 98:2. The stereochemistry at the newly formed chiral center was produced by a syn SN2′-type process. In this reaction, the substituent on the benzene ring of 1 significantly affected the reactivities and selectivities. A plausible reaction mechanism was proposed.

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