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91751-59-6

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91751-59-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91751-59-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,5 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91751-59:
(7*9)+(6*1)+(5*7)+(4*5)+(3*1)+(2*5)+(1*9)=146
146 % 10 = 6
So 91751-59-6 is a valid CAS Registry Number.

91751-59-6Downstream Products

91751-59-6Relevant articles and documents

Role of 2-naphthyl ether intermediate in formation of isolable atropisomers derived from the coupling reaction of (2-hydroxy-3,3-dimethylindolin-l-yl)-(substituted phenyl)methanones with 2-naphthol

Eto, Masashi,Ito, Fumikazu,Sato, Hidetoshi,Shinohara, Itaru,Yamaguchi, Koki,Yoshitake, Yasuyuki,Harano, Kazunobu

experimental part, p. 1485 - 1496 (2009/12/24)

The formation pathway of the atropisomers derived from the reaction of (2-hydroxy-3,3-dimethylindolin-l-yl)(4-substituted phenyl)methanones with 2-naphthol in the presence of BF3·Et2O was discussed on the basis of the isolation of the 2-naphthyl ether intermediate whose structure was determined by single crystal X-ray analysis. The results indicate that the coupling reaction proceeds through stepwise mechanism, i.e., the ether intermediate formation followed by Fries-type rearrangement.

A CONVENIENT SYNTHETIC METHOD OF 1-ACYL-2-ARYL-3,3-DIMETHYLINDOLINE INVOLVING ISOLABLE DIASTEREOMERIC ATROPISOMERS

Kitamura, Takeo,Koga, Toshitaka,Taguchi, Tanezo,Harano, Kazunobu

, p. 1315 - 1318 (2007/10/02)

The synthesis of 1-acyl-2-aryl-3,3-dimethylindoline was improved by the reaction of 1-acyl-2-hydroxy-3,3-dimethylindoline with an arene in the presence of BF3*O(C2H5)2 in dioxane, and stable diastereomeric atropisomers were isolated as products when the a

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