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20414-99-7

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20414-99-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20414-99-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,1 and 4 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 20414-99:
(7*2)+(6*0)+(5*4)+(4*1)+(3*4)+(2*9)+(1*9)=77
77 % 10 = 7
So 20414-99-7 is a valid CAS Registry Number.

20414-99-7Relevant articles and documents

Ligand-Free Iron-Catalyzed Carbon(sp2)-Carbon(sp2) Cross-Coupling of Alkenyllithium with Vinyl Halides

Liu, Qiang,Wang, Zhi-Yong,Peng, Xiao-Shui,Wong, Henry N. C.

, p. 6325 - 6333 (2018/06/01)

An efficient ligand-free iron-catalyzed cross-coupling reaction involving alkenyllithium and vinyl iodides was developed to form diene species in moderate to good yields. This new iron-catalyzed cross-coupling reaction provides a mild, inexpensive, and environmentally friendly avenue toward synthesis of diversified diene derivatives.

Chemoselective construction of substituted conjugated dienes using an olefin cross-metathesis protocol

Funk, Timothy W.,Efskind, Jon,Grubbs, Robert H.

, p. 187 - 190 (2007/10/03)

(Chemical Equation Presented) Various substituted conjugated dienes have been made by olefin cross-metathesis. Using either electronic or steric "protection," one of the olefins of the conjugated diene was deactivated relative to the other for cross-metathesis. The reactions proceed with very high chemoselectivity and, when steric deactivation is used, very high diastereoselectivity.

Regioselective 1,4-addition of ammonia to 1-arylalka-1,3-dienes and 1-aryl-4-phenylbuta-1,3-dienes by photoinduced electron transfer

Kojima, Ryuji,Yamashita, Toshiaki,Tanabe, Kimiko,Shiragami, Tsutomu,Yasuda, Masahide,Shima, Kensuke

, p. 217 - 222 (2007/10/03)

The photoamination of 1-arylalka-1,3-dienes 1a-f and 1-aryl-4-phenylbuta-1,3-dienes 1g-k with NH3 in the presence of p-dicyanobenzene (DCB) gives 4-amino-1-arylalk-2-enes 2a-f and 1-amino-1,4-diarylbut-2-enes 2g-k, respectively. The photoamination proceeds by nucleophilic addition of NH3 to the cation radicals of 1+. generated by photoinduced electron transfer to DCB. The regiochemistry of 2 is related to the distribution of the positive charge in 1+. calculated by the PM3-UHF/RHF method, the stability of the aminated radicals formed by the addition of NH3 to 1+. and the stability of the aminated anion formed by the reduction of the aminated radicals by DCB-.. The stabilities of these intermediates are estimated by the calculation of the heat of formation by the PM3-UHF/RHF method. Distributions of the positive charge in 1+. and the stabilities of the aminated anion show a good agreement with the product analysis.

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