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99893-78-4

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99893-78-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99893-78-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,9 and 3 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 99893-78:
(7*9)+(6*9)+(5*8)+(4*9)+(3*3)+(2*7)+(1*8)=224
224 % 10 = 4
So 99893-78-4 is a valid CAS Registry Number.

99893-78-4Relevant articles and documents

Metal-Free Iodoperfluoroalkylation: Photocatalysis versus Frustrated Lewis Pair Catalysis

Helmecke, Lucas,Spittler, Michael,Schmidt, Bernd M.,Czekelius, Constantin

, p. 123 - 134 (2021)

A comparison of two catalytic, metal-free iodoperfluoroalkylation protocols is presented. Frustrated Lewis pairs [ tBu 3P/B(C 6F 5) 3] or phosphines/phosphites under visible light irradiation efficiently mediate the functionalization of non-activated alkenes and alkynes. A comprehensive account of the corresponding substrate scopes as well as insights into the mechanistic details of both reaction pathways are provided.

Halogen-Bond-Promoted Photoactivation of Perfluoroalkyl Iodides: A Photochemical Protocol for Perfluoroalkylation Reactions

Wang, Yaxin,Wang, Junhua,Li, Guo-Xing,He, Gang,Chen, Gong

supporting information, p. 1442 - 1445 (2017/03/23)

A new protocol for photochemical perfluoroalkylation reactions using perfluoroalkyl iodide, amine additive, and THF solvent is reported. This protocol does not require a photoredox catalyst and proceeds at ambient temperature with irradiation from a compact fluorescent lamp, low-intensity UV lamp, or sunlight. This protocol can be applied to the synthesis of perfluoroalkyl-substituted phenanthridines as well as effect the iodo-perfluoroalkylation of alkenes/alkynes and the C-H perfluoroalkylation of electron-rich arenes and heteroarenes. This C-H perfluoroalkylation reaction offers a unique method for site-selective labeling of oligopeptides at the tryptophan residue.

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