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158665-14-6

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158665-14-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158665-14-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,6,6 and 5 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 158665-14:
(8*1)+(7*5)+(6*8)+(5*6)+(4*6)+(3*5)+(2*1)+(1*4)=166
166 % 10 = 6
So 158665-14-6 is a valid CAS Registry Number.

158665-14-6Relevant articles and documents

Conversion of guanosine into acyclovir and its 6-deoxy derivative

Buck, Ildiko M.,Eleuteri, Alessandra,Reese, Colin B.

, p. 9195 - 9206 (1994)

2-amino-6-(4-chlorophenylthio)-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl) purine 11, which is readily prepared by allowing the corresponding 6-chloro-compound 10 to react with 4-chloro(thiophenol) and triethylamine in methanol solution at room temperature, reacts with boron trifluoride diethyl etherate in boiling dichloromethane solution to give 2-amino-6-(4-chlorophenylthio)-9H-purine 12 in high isolated yield. 9-[(2-acetoxyethoxy)methyl]-2-amino-6-(4-chlorophenylthio)-9H-purine 13, prepared from the latter aglycone 12 in good yield, is converted by a four-step process into acyclovir 1 and by a two-step process into 6-deoxyacyclovir 2.

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