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99522-16-4

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99522-16-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99522-16-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,2 and 2 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 99522-16:
(7*9)+(6*9)+(5*5)+(4*2)+(3*2)+(2*1)+(1*6)=164
164 % 10 = 4
So 99522-16-4 is a valid CAS Registry Number.

99522-16-4Relevant articles and documents

SILICON-DIRECTED BECKMANN FRAGMENTATION

Nishiyama, Hisao,Sakuta, Koji,Osaka, Noriyuki,Arai, Hiroyuki,Matsumoto, Makoto,Itoh, Kenji

, p. 2413 - 2426 (2007/10/02)

The selective fragmentation reactions of β-trimethylsilylketoximes have been proved to proceed effectively with acid catalysts giving the corresponding nitriles.Cyclic silylketoximes gave unsaturated nitriles.The fragmentation in the Beckmann rearrangement is completely controlled and directed by a trimethylsilyl group to lead the regio- and stereo-specific formation of the double bond.The catalytic fragmentation proceeds with the combination of trimethylsilyl ketoxime acetates and trimethylsilyl trifluoromethanesulfonate giving nitriles in high yields.Excellent stereospecificity of the fragmentation based on the stereochemical outcome was discussed.Simple stereo-controlled synthetic approach to some insect pheromones is also described.

A NEW REACTION IN ORGANOSILICON CHEMISTRY: THE OXIDATIVE FRAGMENTATION OF γ-HYDROXY SILANES

Wilson, Stephen R.,Zucker, Paul A.,Kim, Chong-wan,Villa, Carmine A.

, p. 1969 - 1972 (2007/10/02)

The Ce(4+) fragmentation of γ-hydroxy silanes leads to keto-olefins of predictable structure and stereochemistry.

SILICON-DIRECTED BECKMANN FRAGMENTATION. CATALYTIC CLEAVAGE OF CYCLIC β-TRIMETHYLSILYLKETOXIME ACETATES WITH TRIMETHYLSILYL TRIFLUOROMETHANESULFONATE

Nishiyama, Hisao,Sakuta, Koji,Osaka, Noriyuki,Itoh, Kenji

, p. 4021 - 4024 (2007/10/02)

Cyclic (E)-β-trimethylsilylketoxime acetates were effectively cleaved by a catalytic action of trimethylsilyl trifluoromethanesulfonate to give the corresponding unsaturated nitriles.The fragmentation in the Beckmann rearrangement is completely controlled

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