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239450-30-7

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239450-30-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 239450-30-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,9,4,5 and 0 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 239450-30:
(8*2)+(7*3)+(6*9)+(5*4)+(4*5)+(3*0)+(2*3)+(1*0)=137
137 % 10 = 7
So 239450-30-7 is a valid CAS Registry Number.

239450-30-7Upstream product

239450-30-7Downstream Products

239450-30-7Relevant articles and documents

Acetals and vinyl ethers of unsaturated aldehydes and ketones in new syntheses of heterocyclic compounds: IX.* ethoxyvinyl-1,3-dioxinyl cations: Synthesis and reactions with nucleophiles

Arsen'ev,Olekhnovich,Borodkin,Glebova,Minkin,Olekhnovich

, p. 1779 - 1785 (2007/10/03)

New highly reactive 4-(2-ethoxyvinyl)-6-phenyl-1,3-dioxinyl cations were generated by reaction of 4-methyl-6-phenyl-1,3-dioxinylium perchlorates with excess triethyl orthoformate in the presence of 16% perchloric acid. Their reactions with electron-rich aromatic and heteroaromatic substrates result in formation of the corresponding 4-[2-aryl(hetaryl)vinyl]-1,3-dioxinylium derivatives; with compounds possessing an activated methylene group, 1,3-dioxinyIidene jnerocyanines and trimethinecyanines are formed, and with NH compounds, iminium derivatives. Chiral merocyanines were synthesized for the first time from chiral ethoxyvinyldioxinyl cations.

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