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28567-36-4

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28567-36-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28567-36-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,5,6 and 7 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 28567-36:
(7*2)+(6*8)+(5*5)+(4*6)+(3*7)+(2*3)+(1*6)=144
144 % 10 = 4
So 28567-36-4 is a valid CAS Registry Number.

28567-36-4Relevant articles and documents

Highly efficient protection of alcohols as trityl ethers under solvent-free conditions, and recovery catalyzed by reusable nanoporous MCM-41-SO3H

Gholamzadeh, Zeynab,Naimi-Jamal, Mohammad Reza,Maleki, Ali

, p. 994 - 1001 (2015/01/09)

An efficient method was developed for the protection of alcohols as trityl ethers using triphenylmethanol in the presence of nanoporous MCM-41-SO3H as a heterogeneous catalyst under solvent-free ball-milling at room temperature. Low catalyst loading, high efficiency, reusability are among the advantages of this new solvent-free and environmentally friendly method. The deprotection of the produced trityl ethers was also efficiently achieved using the same catalyst in wet acetonitrile.

FeCl3-catalyzed tritylation of alcohols in ionic liquids

Sreedhar,Radhika,Neelima,Chowdary,Rao, M. V. Basaveswara

experimental part, p. 3785 - 3795 (2009/12/08)

A simple and efficient protection of alcohols as trityl ethers is described using trityl chloride in the presence of 5mol% FeCl3 as catalyst in ionic liquids at room temperature in shorter reaction times. This mild and efficient method gives access to the

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