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57918-63-5

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57918-63-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57918-63-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,9,1 and 8 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 57918-63:
(7*5)+(6*7)+(5*9)+(4*1)+(3*8)+(2*6)+(1*3)=165
165 % 10 = 5
So 57918-63-5 is a valid CAS Registry Number.

57918-63-5Relevant articles and documents

Copper-catalyzed cross-coupling of amino acid-derived amides with (Z)-vinyl iodides: Unexpected solvent effect and preparation of plocabulin

Wang, Leiming,Lei, Xinsheng,Wang, Quanrui,Li, Yingxia

, (2021/02/01)

A copper-catalyzed cross-coupling reaction of amino acid-derived amides and (Z)-vinyl iodide was studied to improve a key step in the synthesis of plocabulin, a novel microtubule destabilizer agent of marine origin. The study revealed a profound solvent effect with 1,2-dimethoxyethane (DME), which gave consistently high yields across a large variety of the amide and (Z)-vinyl iodide substrates. The protocol was successfully utilized in the preparation of plocabulin and provided a significantly improved yield.

Concise and gram-scale total synthesis of lansiumamides A and B and alatamide

Lin, Ran,Lin, Xi,Su, Qian,Guo, Binbin,Huang, Yanqin,Ouyang, Ming-An,Song, Liyan,Xu, Huiyou

, (2019/11/05)

The total synthesis of potent anti-obesity lansiumamide B was accomplished in four steps using commercially available materials. The synthetic strategy, featured with copper-catalyzed Buchwald coupling, is concise, convergent, practical and can be carried out on a one-gram scale. This approach could give either Z- or E-configured enamide moiety in natural products with absolute stereocontrol and was applied in the total synthesis of natural products.

Cyclic Vinyl(aryl)iodonium Salts: Synthesis and Reactivity

Kepski, Konrad,Rice, Craig R.,Moran, Wesley J.

supporting information, p. 6936 - 6939 (2019/09/30)

A convenient, highly regioselective synthesis of five-membered cyclic vinyl(aryl)iodonium salts directly from β-iodostyrenes is presented. An X-ray crystal structure confirms the identity of these heterocycles. These λ3-iodanes can be converted

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