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393109-24-5

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393109-24-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 393109-24-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,9,3,1,0 and 9 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 393109-24:
(8*3)+(7*9)+(6*3)+(5*1)+(4*0)+(3*9)+(2*2)+(1*4)=145
145 % 10 = 5
So 393109-24-5 is a valid CAS Registry Number.

393109-24-5Relevant articles and documents

Acceleration of hetero-Michael reaction by symmetrical pentacyclic guanidines

Nagasawa, Kazuo,Georgieva, Angelina,Takahashi, Hiroki,Nakata, Tadashi

, p. 8959 - 8964 (2001)

Symmetrical pentacyclic guanidines 1a-c and 2 which contain the core skeleton of 13,14,15-isocrmbescidine 800, have been synthesized. In the presence of catalytic amounts of these guanidines 1, the reaction rate of the conjugate addition of pyrrolidine (9) to γ-crotonolactone (10) could be enhanced depending upon the size of the cavities and substituents on tetrahydropyran rings of 1 and 2.

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