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105619-05-4

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105619-05-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 105619-05-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,6,1 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 105619-05:
(8*1)+(7*0)+(6*5)+(5*6)+(4*1)+(3*9)+(2*0)+(1*5)=104
104 % 10 = 4
So 105619-05-4 is a valid CAS Registry Number.

105619-05-4Relevant articles and documents

Synthesis of N-Substituted 4-(2-Oxoalkyl)-1,4-dihydronicotinates and Their Inverse Electron Demand Diels-Alder Reaction with 3,4-Dichlorothiophene 1,1-Dioxide

Akiba, Kin-ya,Ohtani, Akira,Yamamoto, Yohsuke

, p. 5328 - 5332 (2007/10/02)

N-Substituted 4-(2-oxoalkyl)-1,4-dihydronicotinates 4 were prepared in high yields by the reaction of quaternized nicotinium salts with silyl enol ethers.These 1,4-dihydronicotinates acted as dienophiles in Diels-Alder reactions with the electron-deficient 3,4-dichlorothiophene 1,1-dioxide.The cycloaddition proceeded regio- and stereoselectively in good yield to give 1,4,4a,8a-tetrahydroquinolines 8.

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