- The syntheses of purine and pyrimidine secoribo-nucleosides: Acyclo-uridine derivative of cyclophosphamide
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The synthesis of secoribo-nucleoside analogues is described. Compounds 4 and 5 possess interesting antiviral effects in vitro. A procedure is also developed for the conversion of acyclo-uridine nucleoside 7 to a novel derivative of cyclophosphamide 8.
- Zakerinia,Davary,Hakimelahi
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- Synthetic method of valganciclovir hydrochloride
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The invention discloses a method for synthesizing valganciclovir hydrochloride, which comprises the following steps: with 1,3-dichloro-2-acetoxymethoxypropane as an initial raw material, preparing monochlorinated ganciclovir, and carrying out esterification, hydrolysis and deprotection salification to finally obtain the valganciclovir hydrochloride. The invention provides a synthesis method of siganciclovir hydrochloride, which avoids the problem of separation and conversion of N-7 and N-9 isomers in the diacetyl guanine condensation process. The method directly synthesizes monochlorinated ganciclovir without using ganciclovir, instead of the synthesis of monoacetyl ganciclovir in the prior art, so that the method avoids the problem of diester compound separation caused by ganciclovir residues, has the advantages of short process steps, simple operation, convenient purification and low cost, is beneficial to industrial production, and is suitable for synthesis of valganciclovir hydrochloride.
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Paragraph 0015; 0035-0038
(2021/04/17)
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