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59142-66-4

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59142-66-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 59142-66-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,9,1,4 and 2 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 59142-66:
(7*5)+(6*9)+(5*1)+(4*4)+(3*2)+(2*6)+(1*6)=134
134 % 10 = 4
So 59142-66-4 is a valid CAS Registry Number.

59142-66-4Relevant articles and documents

Preparation method of indazole and application of indazole in medicine synthesis

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Paragraph 0124; 0125; 0132; 0133, (2017/04/21)

The invention belongs to the field of chemicals, and relates to a preparation method of indazole and an application of the indazole in medicine synthesis. The invention discloses a preparation method of indazole and an application of the indazole in synthesizing 1H-indazole-3-carboxylic acid, lonidamine, a compound 8, a compound 9, a compound 10, axitinib, YD-3, YC-1 and similar substances thereof.

Efficient palladium-catalyzed C(sp2)-H activation towards the synthesis of fluorenes

Song, Juan,Li, Yali,Sun, Wei,Yi, Chenglong,Wu, Hao,Wang, Haotian,Ding, Keran,Xiao, Kang,Liu, Chao

supporting information, p. 9030 - 9033 (2016/11/11)

A facile protocol for the synthesis of fluorene derivatives has been developed through palladium-catalyzed cyclization of 2′-halo-diarylmethanes via activation of arylic C-H bonds. The reactions occurred smoothly and allowed both electron-rich and electron-deficient substrates to convert into their corresponding fluorenes in good to excellent yields. Studies revealed that this Pd-catalyzed cyclization was also available for the substrates of 2′-chloro-diarylmethanes and no catalyst poisoning occurred for 2′-iodo-diphenylmethane.

CuII-catalyzed asymmetric hydrosilylation of diaryl- and aryl heteroaryl ketones: Application in the enantioselective synthesis of orphenadrine and neobenodine

Sui, Yao-Zong,Zhang, Xi-Chang,Wu, Jun-Wen,Li, Shijun,Zhou, Ji-Ning,Li, Min,Fang, Wenjun,Chan, Albert S. C.,Wu, Jing

supporting information; experimental part, p. 7486 - 7492 (2012/07/27)

With certain amounts of sodium tert-butoxide and tert-butanol as additives, catalytic amounts of an inexpensive and easy-to-handle copper source Cu(OAc)2·H2O, a commercially available and air-stable non-racemic dipyridylphosphine ligand, as well as the stoichiometric desirable hydride donor polymethylhydrosiloxane (PMHS), formed a versatile in situ catalyst system for the enantioselective reduction of a broad spectrum of prochiral diaryl and aryl heteroarylketones in air, in high yields and with good to excellent enantioselectivities (up to 96 %). In particular, the practical viability of this process was evinced by its successful applications in the asymmetric synthesis of optically enriched potent antihistaminic drugs orphenadrine and neobenodine. Copyright

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