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521-66-4

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521-66-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 521-66-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,2 and 1 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 521-66:
(5*5)+(4*2)+(3*1)+(2*6)+(1*6)=54
54 % 10 = 4
So 521-66-4 is a valid CAS Registry Number.

521-66-4Upstream product

521-66-4Downstream Products

521-66-4Relevant articles and documents

Further insight into the photochemical behavior of 3-aryl-N-(arylsulfonyl)propiolamides: tunable synthetic route to phenanthrenes

Chen, Ming,Zhao, Xinxin,Yang, Chao,Wang, Yanpei,Xia, Wujiong

, p. 12022 - 12026 (2017)

Reported herein is further insight into the photochemical behaviour of 3-aryl-N-(arylsulfonyl)-propiolamides, which provides a straightforward way to access meaningful phenanthrenes. Mechanistic investigation indicated that aryl migration, C-C coupling, 1,3-hydrogen shift, desulfonylation and elimination were involved in the process. Moreover, this protocol allowed for scale-up using a flow reactor.

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