(12R)-7-Trietylsilyl-11-dihydro-10-deacetylbaccatin III (2), 10-epi-10-deacetylbaccatin III (4) and the 7,8-seco baccatin III (5a) were synthesized from 10-deacetylbaccatin III via an oxidation-reduction protocol.
The retro-aldol reductivefragmentation of different structural types of 7-hydroxy-9,10-dioxotaxoids was investigated, showing that the reaction is typical of taxanes and requires cerium(III) promotion with NaBH4 in protic medium and alkylboron (aluminium) hydrides in aprotic solvents. The resulting 7,8-seco-taxanes are key intermediates for the synthesis of a novel class of anticancer taxanes endowed
Anomalous Microbial Transformations on the Taxane Ring of 10-DAB by a Strain of the Fungus <i>Curvularia lunata</i>: Transbenzoylation, Transacetylation, and Opening of the Oxetane Ring
The fermentation of 10-deacetylbaccatin III (10-DAB) (1) with Curvularialunata afforded the taxane hemiacetals 2a and 3, characterized by extensive structural modification, including C-2 to C-1 transbenzoylation, oxidation of the C-2 hydroxyl, formation of a C-9/C13 hemiacetal, epimerization at C-10, and migration of the endocyclic double bond to an exocyclic location. In compound 3, an acetate-assisted
Abstract The roots of Taxusxmedia gave two new taxoids, the structures of which were established as 10-deacetyl-10-dehydro-7-acetyl taxol A and 10-deacetylyunnanxane on the basis of spectroscopic data.
Biologically active taxane analogs and methods of treatment by oral administration
申请人:Tapestry Pharmaceuticals, Inc.
公开号:US10450323B2
公开(公告)日:2019-10-22
The present invention relates to a novel chemical compound for use in the treatment of cancer, to compositions containing said compound, methods of manufacture and combinations with other therapeutic agents.