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16642-55-0

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16642-55-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16642-55-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,4 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 16642-55:
(7*1)+(6*6)+(5*6)+(4*4)+(3*2)+(2*5)+(1*5)=110
110 % 10 = 0
So 16642-55-0 is a valid CAS Registry Number.

16642-55-0Relevant articles and documents

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Engel,P.S.,Schexnayder,M.A.

, p. 145 - 153 (1975)

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SYNTHETIS OF CYCLIC AND ACYCLIC β,γ-UNSATURATED CARBOXYLIC ACIDS VIA AN E1-TYPE IONIZATION/ELIMINATION OF β-LACTONES

Black, T. Howard,Eisenbeis, Shane A.,McDermott, Todd S.,Maluleka, Stephen L.

, p. 2307 - 2316 (2007/10/02)

Cyclic and acyclic ketones were converted in three steps into 3-alkenoic acids, bearing a variety of substituents in the α-position.The sequence, involving ionization/elimination of a β-lactone, affords high yields of pure products uncontaminated with conjugated isomers.Support for an E1-type mechanism is also provided.

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