Process for preparing neuraminidase inhibitor ro-64-0796

摘要

The invention provides a multistep process for preparing 1,2-diamino compounds of formula wherein R<1>, R<1'>, R<2>, R<2',> R<3> and R<4> have the meaning given in the specification and pharmaceutically acceptable addition salts thereof, from 1,2-epoxides of formula wherein R<1>, R<1'>, R<2> and R<2'> have the meaning given in the specification.