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256487-37-3

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256487-37-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 256487-37-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,4,8 and 7 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 256487-37:
(8*2)+(7*5)+(6*6)+(5*4)+(4*8)+(3*7)+(2*3)+(1*7)=173
173 % 10 = 3
So 256487-37-3 is a valid CAS Registry Number.

256487-37-3Downstream Products

256487-37-3Relevant 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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