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668988-18-9

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668988-18-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 668988-18-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,8,9,8 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 668988-18:
(8*6)+(7*6)+(6*8)+(5*9)+(4*8)+(3*8)+(2*1)+(1*8)=249
249 % 10 = 9
So 668988-18-9 is a valid CAS Registry Number.

668988-18-9Relevant articles and documents

A Versatile Synthesis of α-Amino Acid Derivatives via the Ugi Four-Component Condensation with a Novel Convertible Isonitrile

Rikimaru, Kentaro,Yanagisawa, Arata,Kan, Toshiyuki,Fukuyama, Tohru

, p. 41 - 44 (2007/10/03)

The Ugi four-component condensation (4CC) reaction with the carbonate-type isonitrile 9 proceeded smoothly, and subsequent base treatment of the Ugi products 10 provided the N-acyloxazolidinones 11 in high yield. The N-acyloxazolidinones derivatives can be reacted with several hetero-nucleophiles, namely, reaction of 11 with thiolates gave thiol ester derivatives 16 efficiently.

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