[EN] SYNTHESIS OF ACYCLIC NUCLEOSIDE DERIVATIVES<br/>[FR] SYNTHESE DE DERIVES DE NUCLEOSIDE ACYCLIQUE
申请人:MEDIVIR AB
公开号:WO2000008025A1
公开(公告)日:2000-02-17
Novel intermediates and improvements in the synthesis of acyclic guanine nucleoside prodrugs of the formula (R)-9-[(2-alkanoylmethyl)-4-(aminoacyloxy)butyl]guanine (for example valtamociclovir stearate), including purine salts amenable to one pot alkylation with the acyclic side chain, acyclic 2-amino-6-halo-purine and protected guanine precursors, one pot manipulations thereof and last step work up procedures.
Methods and novel intermediates for the preparation of acyclic nucleoside derivatives of the formula:
where one of R
1
and R
2
is an amino acid acyl group and the other of R
1
and R
2
is a —C(O)C
3
-C
21
saturated or monounsaturated, optionally substituted alkyl and R
3
is OH or H; or a pharmaceutically acceptable salt thereof.