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668478-79-3

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668478-79-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 668478-79-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,8,4,7 and 8 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 668478-79:
(8*6)+(7*6)+(6*8)+(5*4)+(4*7)+(3*8)+(2*7)+(1*9)=233
233 % 10 = 3
So 668478-79-3 is a valid CAS Registry Number.

668478-79-3Upstream product

668478-79-3Relevant articles and documents

Aerobic Visible-Light Induced Intermolecular S?N Bond Construction: Synthesis of 1,2,4-Thiadiazoles from Thioamides under Photosensitizer-Free Conditions

Wang, Hui,Xie, Shihua,Zhu, Hongjun,Zhuo, Liang

supporting information, p. 3398 - 3402 (2021/06/25)

Aerobic visible-light induced intermolecular S?N bond construction has been achieved without the addition of photosensitizer, metal, or base. With this strategy, 1,2,4-thiadiazoles can be obtained from thioamides. Preliminary mechanistic investigation suggested that the excited state of thioamides undergoes a single-electron-transfer (SET) process to afford thioamidyl radicals, which can be further transformed into a 1,2,4-thiadiazole through desulfurization and oxidative cyclization. The reaction has good functional group tolerance and represents a green method for the construction of S?N bonds.

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