| 摘要 |
<p>Compounds of formula <CHEM> in which R1 represents a hydrogen atom or a hydroxyl protecting group; R2 represents a hydrogen atom or a trialkylsilyl group, and -X-Y- represents the epoxide group (A) or the alkene group (B). <CHEM> wherein R3 represents a C1-6alkyl group optionally substituted by halogen or an optionally substituted phenyl group, useful as intermediates in the preparation of antibacterially active compound.</p> |
