A process of providing novel compounds of Formula (I) below, which are useful as intermediates in the preparation of camptothecin and camptothecin-like compounds, ##STR1## wherein: R.sup.1 represents alkyl, particularly methyl, R.sup.2 represents H or alkyl, particularly methyl, R3 represents H or alkyl, particularly H; Q represents triflate or halo particularly bromo and iodo more particularly iodo and Y represents H, chloro or OR.sup.4, wherein R.sup.4 represents alkyl or triflate, or particularly H.
提供以下式(I)的新化合物的过程,这些化合物在
紫杉醇和类
紫杉醇化合物的制备中作为中间体是有用的,其中:R.sup.1代表烷基,特别是甲基,R.sup.2代表H或烷基,特别是甲基,R3代表H或烷基,特别是H;Q代表
三氟甲磺酸酯或卤素,特别是
溴和
碘,更特别是
碘,Y代表H,
氯或OR.sup.4,其中R.sup.4代表烷基或
三氟甲磺酸酯,或特别是H。