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154821-87-1

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154821-87-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 154821-87-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,4,8,2 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 154821-87:
(8*1)+(7*5)+(6*4)+(5*8)+(4*2)+(3*1)+(2*8)+(1*7)=141
141 % 10 = 1
So 154821-87-1 is a valid CAS Registry Number.

154821-87-1Relevant 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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