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228403-33-6

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228403-33-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 228403-33-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,8,4,0 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 228403-33:
(8*2)+(7*2)+(6*8)+(5*4)+(4*0)+(3*3)+(2*3)+(1*3)=116
116 % 10 = 6
So 228403-33-6 is a valid CAS Registry Number.

228403-33-6Relevant articles and documents

Efficient synthesis of 40- and 48-membered tetraether macrocyclic bisphosphocholines.

Patwardhan,Thompson

, p. 241 - 243 (2008/02/13)

An efficient route toward the synthesis of unsaturated (bis-diacetylenic) and saturated 40- and 48-membered macrocyclic biphosphocholines has been developed using 2-phenyl-5-hydroxy-1,3-dioxane as a common glycerol synthon. Ring closure was accomplished using either high-dilution Glaser oxidation of [(Cy3P)2RU==CHPh]Cl2-catalyzed olefin metathesis conditions. Deprotection of benzyl ethers using trimethylsilyl iodide (TMS-I) in the presence of diacetylenic moieties has also been demonstrated for the first time.

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