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289631-40-9

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289631-40-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 289631-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,9,6,3 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 289631-40:
(8*2)+(7*8)+(6*9)+(5*6)+(4*3)+(3*1)+(2*4)+(1*0)=179
179 % 10 = 9
So 289631-40-9 is a valid CAS Registry Number.

289631-40-9Downstream Products

289631-40-9Relevant academic research and scientific papers

Synthetic studies of an 18-membered antitumor macrolide, tedanolide. 6. Synthesis of a key intermediate via a highly efficient macrolactonization of a computer-aid designed seco-acid

Matsushima, Tomohiro,Nakajima, Noriyuki,Zheng, Bao-Zhong,Yonemitsu, Osamu

, p. 855 - 860 (2007/10/03)

A stereoselective synthesis is described of the 18-membered lactone (2) via an efficient macrolactonization of the conformation-controlled seco-acid (3); this was designed with the aid of molecular mechanics (MM)-calculation and synthesized by coupling between the C1 - C12 (4) and C13 - C23 (5) fragments.

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