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28321-09-7

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28321-09-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28321-09-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,3,2 and 1 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 28321-09:
(7*2)+(6*8)+(5*3)+(4*2)+(3*1)+(2*0)+(1*9)=97
97 % 10 = 7
So 28321-09-7 is a valid CAS Registry Number.

28321-09-7Relevant articles and documents

Stereoselective formation of Z-monofluoroalkenes by nickel-catalyzed defluorinative coupling of gem?difluoroalkenes with lithium organoborates

Huang, Weichen,Shen, Qilong,Xiao, Yisa

supporting information, (2022/02/02)

A method for stereoselective construction of Z-monofluoroalkenes by nickel-catalyzed defluorinative coupling of gem?difluoroalkenes in mild conditions was described. The combination of lithium organoborate and ZnBr2 generated in situ lithium ar

-Annulation of gem-Difluoroalkenes and Pyridinium Ylides: Access to Functionalized 2-Fluoroindolizines

Zhang, Jun-Qi,Hu, Dandan,Song, Jinyu,Ren, Hongjun

, p. 4646 - 4660 (2021/04/06)

A [3 + 2]-annulation of gem-difluoroalkenes and pyridinium ylides was developed employing ambient air as the sole oxidant in an open-vessel manner, affording a series of multifunctionalized 2-fluoroindolizines in moderate to good yields. In this reaction, gem-difluoroalkene acts as a C2 synthon and entirely avoids the competitive addition-elimination process, which provides facile access to 2-fluoroindolizines.

Design and Synthesis of TY-Phos and Application in Palladium-Catalyzed Enantioselective Fluoroarylation of gem-Difluoroalkenes

Li, Zhiming,Lin, Tao-Yan,Liu, Yu,Pan, Zhangjin,Tu, Youshao,Wu, Hai-Hong,Zhang, Junliang,Zhu, Shuai

supporting information, p. 22957 - 22962 (2020/10/19)

The first example of highly enantioselective fluoroarylation of gem-difluoroalkenes with aryl halides is presented by using a new chiral sulfinamide phosphine (Sadphos) type ligand TY-Phos. N-Me-TY-Phos can be easily synthesized on a gram scale from readily available starting materials in three steps. Salient features of this work including readily available starting materials, good yields, high enantioselectivities as well as broad substrate scope make this approach very practical and attractive. Notably, the asymmetric synthesis of an analogue of a biologically active molecule is also reported.

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