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189364-05-4

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189364-05-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189364-05-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,3,6 and 4 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 189364-05:
(8*1)+(7*8)+(6*9)+(5*3)+(4*6)+(3*4)+(2*0)+(1*5)=174
174 % 10 = 4
So 189364-05-4 is a valid CAS Registry Number.

189364-05-4Upstream product

189364-05-4Downstream Products

189364-05-4Relevant articles and documents

Total syntheses of (-)-mesembrane and (-)-mesembrine via palladium-catalyzed enantioselective allylic substitution and zirconium-promoted cyclization

Mori,Kuroda,Zhang,Sato

, p. 3263 - 3270 (2007/10/03)

4-Arylhexahydroindole derivatives 5 were synthesized from 2-arylcyclohexenyl allylamine derivatives 4, which have a large protecting group on nitrogen, using zirconium-promoted cyclization. Reaction of 4e with Cp2ZrBu2, followed by treatment with MeMgBr and then O2, gave 2a in 63% yield by a one-pot reaction, since the approach of O2 to zirconium was prevented by the aryl group. The total syntheses of (+)-mesembrane and (+)-mesembrine were achieved starting from 2a. To synthesize these natural products in a chiral form, the starting allylamine derivative 24 (80% yield, 86% ee, recrystallized from MeOH, 99% ee with 79% recovery) was prepared from allyl carbonate 22a and N-tosylallylamine 23 using palladium-catalyzed asymmetric amination in the presence of (S)-BINAPO as a chiral ligand. (-)-Mesembrane and (-)-mesembrine were synthesized from this allylamine 24.

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