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68945-68-6

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68945-68-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 68945-68-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,9,4 and 5 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 68945-68:
(7*6)+(6*8)+(5*9)+(4*4)+(3*5)+(2*6)+(1*8)=186
186 % 10 = 6
So 68945-68-6 is a valid CAS Registry Number.

68945-68-6Relevant articles and documents

A Total Synthesis of the Sesquiterpene Quinone Metachromin-A

Almeida, Wanda P.,Correia, Carlos Roque D.

, p. 1367 - 1370 (2007/10/02)

The first total synthesis of the marine natural product metachromin A was accomplished through a convergent synthesis amenable to the preparation of synthetic analogues.The main features of this synthesis are the introduction the oxygenation at C17 employing a Thiele acetoxylation reaction and a stereoselective Horner-Wadsworth-Emmons coupling of a nonstabilized phosphonate with a methyl ketone derivative to generate the required (E)-trisubstituted double bond.

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