Researches on antiviral agents. 3. synthesis and transformations of racemic and chiral 6-oxiranyl pyrimidinones.
摘要:
The synthesis of epoxides 3, 4 and 6 has been described. The transformation of 3 into C-6 alkylated uracils 22a-e, 23a-d, 24 and 25 is also reported The chiral epoxide (S)-(+)-3 has been prepared via a modified Solladie procedure, while the ZnCl2- DIBAH reduction step failed to give the expected enantiomer (R)-(-)-3. This result has been discussed on the ground of molecular modeling studies.
The synthesis of epoxides 3, 4 and 6 has been described. The transformation of 3 into C-6 alkylated uracils 22a-e, 23a-d, 24 and 25 is also reported The chiral epoxide (S)-(+)-3 has been prepared via a modified Solladie procedure, while the ZnCl2- DIBAH reduction step failed to give the expected enantiomer (R)-(-)-3. This result has been discussed on the ground of molecular modeling studies.
Researches on antiviral agents.2. Enantiospecific synthesis of 1,3-dimethyl-6-oxiranylpyrimidin-2,4-dione with anti-ASFV activity.
Chiral epoxide (+)2 has been synthesized in very good yield and high enantiomeric excess via a modified Solladié procedure starting from commercially available orotic acid. Chiral HPLC chromatographic analysis and 300 MHz 1H-NMR with the addition of chiralshiftreagent Eu(hfc)3 of compound (+)2 are also reported.