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433211-61-1

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433211-61-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 433211-61-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,3,2,1 and 1 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 433211-61:
(8*4)+(7*3)+(6*3)+(5*2)+(4*1)+(3*1)+(2*6)+(1*1)=101
101 % 10 = 1
So 433211-61-1 is a valid CAS Registry Number.

433211-61-1Downstream Products

433211-61-1Relevant articles and documents

Preparation of new nitrogen-bridged heterocycles. 53. Syntheses of 3-(benzylthio)thieno[3,4-b]indolizine derivatives and their intramolecular arene-arene interactions.

Kakehi, Akikazu,Ito, Suketaka,Suga, Hiroyuki,Miwa, Takeyuki,Mori, Takashi,Fujii, Tsuneo,Tanaka, Nobuaki,Kobayashi, Tomoshige

, p. 75 - 84 (2007/10/03)

Various ethyl 1-arylcarbonyl-3-[(un)substituted methylthio]thieno[3,4-b]indolizine-9-carboxylates were synthesized in good yields by a novel methodology in which the S-alkylation of 5-arylcarbonyl-4-ethoxycarbonylmethyl-3-(1-pyridinio)thiophene-2-thiolates with alkyl or benzyl halides, the 1,5-dipolar cyclization of the resulting pyridinium salts in the presence of a base, and the aromatization were performed. In the X-ray analyses of some 3-(benzylthio)thieno[3,4-b]indolizine-9-carboxylates, a gauche and two anti conformers in relation to the exocyclic sulfide linkage were found. Interestingly, all of the 3-(benzylthio)thieno[3,4-b]indolizine derivatives showed significant high-field shifts (delta up to 0.3 ppm) for the 5- and 6-proton signals compared with those of the 3-methylthio derivatives in the (1)H-NMR spectra and exhibited a definite absorption band near 425 nm in their UV spectra, indicating an intramolecular arene-arene interaction between the thieno[3,4-b]indolizine and the phenyl ring.

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