Polyketides via C-C Coupling of Alcohols: Green Chemistry

描述（由申请人提供）：我们的实验室发现了一种广泛的新型催化方法，通过直接醇C-H官能化促进C-C键形成。在上一个资助期，这项技术使全合成 6-脱氧丝裂霉素B、苔藓抑素7、三烯霉素A和F、蓝藻菌素A、roxaticin，以及利福霉素S和scytophycin C的形式合成，利用最简洁的途径获得这些相应天然产物家族的任何成员。在拟议的资助期间，这些路线将被调整，以制备苔藓抑素和三烯霉素的功能类似物。我们的苔藓抑素类似物将在与Peter M. Blumberg博士说，他是NCI癌症生物学和遗传学实验室肿瘤促进分子机制科科长。苔藓抑素类似物也将与葛兰素史克的同事合作，在HIV病毒再活化试验中进行评估。三烯霉素类似物将在德克萨斯州药物和诊断开发研究所（TI-3D）进行评价。在利用醇C-C偶联来简化几种I型聚酮化合物的合成后，我们现在将开始发展一套组装治疗相关的II型聚酮化合物天然产物的方法，例如（+）-内酯霉素，其显示出对MRSA的有效抗菌活性。

DESCRIPTION (provided by applicant): Our laboratory has discovered a broad, new class of catalytic processes that promote C-C bond formation via direct alcohol C-H functionalization. In the prior funding period, this technology enabled total syntheses of 6-deoxyerythronolide B, bryostatin 7, trienomycins A and F, cyanolide A, roxaticin, and formal syntheses of rifamycin S and scytophycin C, availing the most concise routes to any member of these respective natural products families. In the proposed funding period, these routes will be adapted to prepare functional analogues of bryostatin and trienomycin. Our bryostatin analogues will be evaluated in an ongoing collaboration with Dr. Peter M. Blumberg, who is Chief, Molecular Mechanisms of Tumor Promotion Section in the Laboratory of Cancer Biology and Genetics at the NCI. The bryostatin analogues also will be evaluated in HIV viral reactivation assays in collaboration with colleagues at GlaxoSmithKline. Trienomycin analogues will be evaluated at the Texas Institute for Drug and Diagnostics Development (TI-3D). Having utilized alcohol C-C coupling to streamline the synthesis of several type I polyketides, we will now begin to evolve a suite of methods to assemble therapeutically relevant type II polyketide natural products, such as (+)-lactonamycin, which displays potent antibacterial activity against MRSA.