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4-(4-cyano-phenyl)-4-oxo-butyric acid methyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

90991-21-2

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90991-21-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90991-21-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,9,9 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 90991-21:
(7*9)+(6*0)+(5*9)+(4*9)+(3*1)+(2*2)+(1*1)=152
152 % 10 = 2
So 90991-21-2 is a valid CAS Registry Number.

90991-21-2Relevant academic research and scientific papers

Transition Metal-Free Alkyne-Aldehyde Reductive C?C Coupling trough Cascade Borylation/Olefin Isomerization

Khan, Imran,Luo, Zhibin,Xu, Yin,Xie, Jimin,Zhu, Weihua,Liu, Bin

, (2020/05/04)

A direct approach to γ-keto esters through cascade alkyne-aldehyde reductive C?C coupling of propargyl esters and aromatic aldehydes under transition-metal-free (TM-free) fashion was developed. Compared with multistep processes, this procedure provides a

One-pot synthesis of oxo acid derivatives by RhI-catalyzed chelation-assisted hydroacylation

Jo, Eun-Ae,Jun, Chul-Ho

, p. 2504 - 2507 (2007/10/03)

Various oxo acid derivatives were obtained directly from the reaction of aliphatic and aromatic aldehydes with ω-alkenoic acid derivatives in the presence of rhodium(I) complexes and 2-amino-3-picoline. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.

Intermolecular hydroacylation of acrylate esters: A new route to 1,4-dicarbonyls

Willis,Sapmaz

, p. 2558 - 2559 (2007/10/03)

1,4-Dicarbonyl compounds can be prepared using a Rh(I) mediated hydroacylation reaction between (2-aminopicolyl)imines and acrylate esters followed by acid hydrolysis.

Aspects of Tautomerism. 13. Alkaline Hydrolysis of γ-, δ-, and ε-Keto Esters and their Desoxy Analogues. Geometrical Constraints on Keto Participation

Bhatt, M. Vivekananda,Ravindranathan, M.,Somayaji, Viswanatha,Rao, G. Venkoba

, p. 3170 - 3173 (2007/10/02)

The rates of alkaline hydrolysis of methyl β-benzoylpropionate (I), methyl γ-benzoylbutyrate (II) and methyl δ-benzoylvalerate (III) decrease in the order I>II>III.Keto participation is the predominant pathway in the case of γ-keto esters.Evidence has also been obtained for keto participation in the case of δ-keto esters, whereas no such evidence is available in the case of ε-keto esters studied.

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