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6523-63-3

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6523-63-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6523-63-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,2 and 3 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6523-63:
(6*6)+(5*5)+(4*2)+(3*3)+(2*6)+(1*3)=93
93 % 10 = 3
So 6523-63-3 is a valid CAS Registry Number.

6523-63-3Relevant articles and documents

Development of a scaleable synthesis of a geminal dimethyl tertiary amine as an inhaled muscarinic antagonist for the treatment of COPD

Dillon, Barry R.,Roberts, Dannielle F.,Entwistle, David A.,Glossop, Paul A.,Knight, Craig J.,Laity, Daniel A.,James, Kim,Praquin, Celine F.,Strang, Ross S.,Watson, Christine A. L.

supporting information; experimental part, p. 195 - 203 (2012/06/05)

An efficient and scalable process for the synthesis of muscarinic antagonist, PF-3635659 1, is described, illustrating redesign of an analogue-targeted synthesis which contained a scale-limiting rhodium-activated C-H amination step. The final route includes a reproducible modified Bouveault reaction which has not previously been reported on a substrate of this complexity, or on such a scale with over 5 kg of the requisite gem-dimethylamine prepared via this methodology.

CARBOXAMIDE DERIVATIVES AS MUSCARINIC RECEPTOR ANTAGONISTS

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Page/Page column 41, (2008/06/13)

The invention relates to compounds of Formula (I) processes and intermediates for their preparation, their use as muscarinic antagonists and pharmaceutical composition containing them.

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