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500217-05-0

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500217-05-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 500217-05-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,0,2,1 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 500217-05:
(8*5)+(7*0)+(6*0)+(5*2)+(4*1)+(3*7)+(2*0)+(1*5)=80
80 % 10 = 0
So 500217-05-0 is a valid CAS Registry Number.

500217-05-0Relevant articles and documents

Synthesis of a derivative of a pentasaccharide repeating unit of the O-antigenic polysaccharide of the bacterium Klebsiella pneumoniae O3 as a benzoylated 2-methoxycarbonylethyl thioglycoside

Abronina,Galkin,Backinowsky,Grachev

experimental part, p. 457 - 467 (2010/07/08)

Block synthesis of a fully benzoylated derivative of the pentasaccharide α-d-Manp-(1→3)-α-d-Manp-(1→2)-α-d-Manp-(1→2) -α-d-Manp-(1→2)-α-d-Manp-SCH2CH2CO 2Me, the glycoside of the repeating unit of the O-antigenic polysaccharide of the bacterium Klebsiella pneumoniae O3, was performed.

An efficient and practical synthesis of α-(1→3)-linked mannohexaose and mannooctaose

Chen, Langqiu,Kong, Fanzuo

, p. 341 - 353 (2007/10/03)

α-(1→3)-Linked mannohexaose and mannooctaose as their methyl glycosides were synthesized from condensation of the corresponding α-(1→3)-linked di- (9) and tetrasaccharide donor (21) with the tetrasaccharide acceptor (23), respectively, followed by deacylation. The donor 21 and acceptor 23 were prepared readily from activation of C-1 of the tetrasaccharide 20 and deallylation of the tetrasaccharide 22, respectively. The tetrasaccharide 20 was prepared from oxidative cleavage of 1-O-p-methoxyphenyl of 19, which was obtained from coupling of 9 with 11. The tetrasaccharide 22 was obtained from condensation of the donor 13 with the acceptor 18. These disaccharides 9, 11, 13, and 18 were produced easily by simple chemical transformation using p-methoxyphenyl 3-O-allyl-α-D-mannopyranoside (1) and 2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl trichloroacetimidate (6), and methyl 3-O-allyl-α-D-mannopyranoside (14) as the synthons.

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