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92011-93-3

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92011-93-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 92011-93-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,2,0,1 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 92011-93:
(7*9)+(6*2)+(5*0)+(4*1)+(3*1)+(2*9)+(1*3)=103
103 % 10 = 3
So 92011-93-3 is a valid CAS Registry Number.

92011-93-3Relevant articles and documents

Pd-catalyzed asymmetric allylic amination with BOP ligands and its applications to the synthesis of fused polycyclic alkaloids

Zang, Yang,Ojima, Iwao

supporting information, p. 3288 - 3292 (2015/05/27)

Abstract Pd-catalyzed asymmetric allylic amination reaction of piperonylamides and a 2-siloxymethylcyclohexenyl carbonate, using chiral biphenol-based diphosphinite (BOP) ligands gave the corresponding cyclohexenylpiperonylamides in excellent yield and en

Synthesis of chiral biphenol-based diphosphonite ligands and their application in palladium-catalyzed intermolecular asymmetric allylic amination reactions

Shi, Ce,Chien, Chih-Wei,Ojima, Iwao

, p. 674 - 680 (2011/10/12)

A library of new 2,2'-bis(diphenylphosphinoyloxy)-1,1'-binaphthyl (binapo)-type chiral diphosphonite ligands was designed and synthesized based on chiral 3,3',5,5',6,6'-hexasubstituted biphenols. These bop ligands have exhibited excellent efficiency in a palladium-catalyzed intermolecular allylic amination reaction, which provides a key intermediate for the total synthesis of Strychnos indole alkaloids with enantiopurities of up to 96% ee. A library of chiral diphosphonite (bop) ligands was synthesized based on chiral hexasubstituted biphenols with fine-tuning capability. Their application for the synthesis of a key intermediate to indole alkaloids through a palladium-catalyzed intermolecular asymmetric allylic amination is reported (TBS=tert-butyldimethylsilyl, TIPS=triisopropylsilyl, dba=dibenzylideneacetone). Copyright

Divergent enantioselective synthesis of (-)-galanthamine and (-)-morphine

Trost, Barry M.,Tang, Weiping,Toste, F. Dean

, p. 14785 - 14803 (2007/10/03)

An efficient divergent synthetic strategy for the synthesis of the opiate and amaryllidaceae alkaloids emerges by employing a Pd-catalyzed asymmetric allylic alkylation (AAA) to set the stereochemistry. Three generations of syntheses of galanthamine are discussed in detail with particular focus on the scope of the palladium-catalyzed AAA reactions and intramolecular Heck reactions. The pivotal tricyclic intermediate is available in six steps from 2-bromovanillin and the monoester of methyl 6-hydroxycyclohexene-1-carboxylate. This intermediate requires only two steps to convert to (-)-galanthamine. Using a Heck vinylation, we found that the fourth ring of codeine/morphine could be formed. The final ring formation involves a novel visible light-promoted hydroamination. Thus, six steps are required to convert the pivotal tricyclic intermediate into codeine, which has been demethylated in high yield to morphine.

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