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67737-49-9

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67737-49-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67737-49-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,7,3 and 7 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 67737-49:
(7*6)+(6*7)+(5*7)+(4*3)+(3*7)+(2*4)+(1*9)=169
169 % 10 = 9
So 67737-49-9 is a valid CAS Registry Number.

67737-49-9Relevant articles and documents

Synthesis of methyl 2-O-allyl-(and 3-O-allyl-)5-O-benzyl-β-D-ribofuranoside

Desai,Gigg,Gigg

, p. 209 - 221 (2007/10/03)

D-Ribose was converted into methyl 5-O-benzyl-β-D-ribofuranoside and this, on tin-mediated allylation, gave a mixture of the 2-O-allyl and 3-O-allyl derivatives which were separated by chromatography. The more polar isomer was characterised as the 3-O-allyl derivative after conversion via 3-O-allyl-5-O-benzyl-1,2-O-isopropylidene-α-D-ribofuranose (which was also synthesised from 3-O-allyl-1,2:5,6-di-O-isopropylidene-α-D-allofuranose) into the known 5-O-benzyl-1,2-O-isopropylidene-α-D-ribofuranose. Methyl 3-O-allyl-5-O-benzyl-β-D-ribofuranoside was converted into methyl 2-O-allyl-5-O-benzyl-β-D-ribofuranoside via methyl 2-O-allyl-5-O-benzyl-3-O(prop-1-enyl)-β-D-ribofuranoside.

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