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98815-39-5

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98815-39-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98815-39-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,8,1 and 5 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 98815-39:
(7*9)+(6*8)+(5*8)+(4*1)+(3*5)+(2*3)+(1*9)=185
185 % 10 = 5
So 98815-39-5 is a valid CAS Registry Number.

98815-39-5Relevant articles and documents

Metal-Free Cascade Annulation Approach for Modular Assembly of Alkynyl/Benzoyl Functionalized Quinolines

Tang, Qiang,Yuan, Meng,Duan, Jiahui,Xu, Keke,Li, Ruxue,Xie, Mengqing,Kong, Shuwen,He, Xinwei,Shang, Yongjia

supporting information, (2022/01/19)

A concise and efficient synthetic method for alkynyl quinolines through TfOH-promoted cascade 1,4-conjugate addition/intramolecular annulation/aromatization process is established. By virtue of reactive aza-o-AQM (in situ generated from modular propargylamine), this reaction proceeds smoothly to afford a variety of alkynyl quinolines in good to excellent yields. This transition-metal-free process features halogen groups tolerance, such as the ?Cl, ?Br, and ?I groups; thus, this protocol circumvents the inherent shortcomings of the existing Sonogashira coupling of halogenated quinolines.

Iodine-Promoted Formal [3+2] Cycloaddition of Enaminone: Access to 2-Hydroxy-1,2-dihydro-pyrrol-3-ones with Quaternary Carbon Center

Yu, Xiao-Xiao,Zhao, Peng,Zhou, You,Huang, Chun,Wang, Li-Sheng,Wu, Yan-Dong,Wu, An-Xin

, p. 12141 - 12147 (2021/09/07)

A novel iodine promoted cyclization of enaminone with aryl methyl ketones has been developed as a straightforward method for constructing 2-hydroxy-pyrrol-3(2H)-ones. This strategy affords structurally diverse 2-hydroxy-pyrrol-3(2H)-ones rings in high yields. Moreover, a quarternary alcohol has been constructed efficiently in the reaction. Product purification required only washing with CH2Cl2 solvent, thereby avoiding traditional chromatography and recrystallization, making this an example of group-assisted purification chemistry.

Unusual Reactivity of 4-Vinyl Isoxazoles in the Copper-Mediated Synthesis of Pyridines, Employing DMSO as a One-Carbon Surrogate

Kumar, Pravin,Kapur, Manmohan

supporting information, p. 5855 - 5860 (2020/07/30)

An efficient protocol for the synthesis of nicotinate derivatives and tetrasubstituted pyridines through a copper-mediated cleavage of isoxazoles has been developed. The highlight of the work is the observation of an unusual reactivity of 4-vinyl isoxazoles under the reaction conditions. DMSO serves as a one-carbon surrogate generating an active methylene group during the reaction to form two C-C bonds. This protocol provides a facile and an expeditious approach for the assembly of densely substituted N-heterocyclic compounds.

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