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99337-17-4

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99337-17-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99337-17-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,3,3 and 7 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 99337-17:
(7*9)+(6*9)+(5*3)+(4*3)+(3*7)+(2*1)+(1*7)=174
174 % 10 = 4
So 99337-17-4 is a valid CAS Registry Number.

99337-17-4Downstream Products

99337-17-4Relevant articles and documents

Palladium- and Nickel-Catalyzed Reaction of Trimethylsilyl Cyanide with Acetylenes. Addition of Trimethylsilyl Cyanide to the Carbon-Carbon Triple Bonds

Chatani, Naoto,Takeyasu, Takumi,Horiuchi, Nobuhiko,Hanafusa, Terukiyo

, p. 3539 - 3548 (2007/10/02)

The reaction of trimethylsilyl cyanide (1) with acetylenes in the presence of a transition-metal complex was investigated.The structures of starting acetylenes and catalysts and both amounts of solvent and 1 highly affected product distributions.The PdCl2/pyridine catalyzed reaction of phenylacetylene and para-substituted phenylacetylenes with 1 resulted in the addition of 1 to the carbon-carbon triple bonds to give cyano-substituted vinylsilanes in good to high yields with high regio- and stereoselectivity.Ortho-substituted phenylacetylenes gave addition products less stereoselectively.Stereoselectivity affording Z adducts decreased in the order of para- meta- ortho-substituted phenylacetylenes.The NiCl2/DIBAH-catalyzed reaction of arylacetylenes was less stereoselective regardless of substitution patterns of arylacetylenes used.When the nickel-catalyzed reaction of arylacetylenes was run without solvent using an excess amount of 1, 5-amino-1H-pyrrole-2-carbonitriles were obtained as a single product, instead of the above simple addition products.The reaction of terminal aliphatic acetylenes with 1 also gave addition products with moderate stereoselectivity.Internal acetylenes gave complex mixtures including addition products and/or pyrrole derivatives.Diarylacetylenes afforded 5-amino-1H-pyrrole-2-carbonitriles selectively in the presence of a palladium or nickel catalyst (without solvent and an excess amount of 1).Intramolecular cyclization of a 1,6-diyne was also studied.

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