Total Synthesis of the Resorcylic Lactone-Based Kinase Inhibitor L-783277
作者:Karl-Heinz Altmann、Tatjana Hofmann
DOI:10.1055/s-2008-1078406
日期:2008.6
The total synthesis of the natural product L-783277 (1) has been accomplished based on the convergent assembly of building blocks 9, 10, and 14. Key steps are the Suzuki coupling of olefin 11 and aromatic building block 14, the Mitsunobu-based macrolactonization of seco acid 16, and the allylic oxidation of the macrocyclic triol 2 with polymer-bound IBX. Only one of the two C6′-stereoisomers of 2 provided L-783277 (1) with high selectivity.
efficient and practicaltotalsynthesis of aigialomycin D 1 is described. This concise synthetic route features the use of readily available starting materials with the key transformations being the formation of the macrocycle by RCM under microwave irradiation conditions to effect complete E-selectivity, and regio- and stereospecific formation of the 1′,2′-double bond. The synthesis of aigialomycin
Aigialomycin D and Derivatives Thereof and Their Use in Treating Cancer or Malaria or a Microbial Infection
申请人:Chen Anqi
公开号:US20100041745A1
公开(公告)日:2010-02-18
The invention describes a process for making compound (2), comprising the step of cyclising diene (3). Compound (2) may be aigialomycin D or a derivative thereof or may be elaborated to make aigialomycin D or derivative thereof. Furthermore compound (2) or derivative thereof can be used in treating cancer or malaria or a microbial infection.
Synthesis and potential antidiabetic and lipid-lowering activities of putative asperidine B and its desmethyl analogue
作者:Kittisak Thongpat、Pannita Holasut、Atcharaporn Ontawong、Jakkapong Inchai、Acharaporn Duangjai、Vatcharin Rukachaisirikul、Chutima S. Vaddhanaphuti、Kwanruthai Tadpetch
DOI:10.1016/j.bmcl.2023.129437
日期:2023.9
pyrrolidin-3-ol alkaloid. This work reports the first enantioselective synthesis of putative asperidine B and its desmethyl analogue via a chiron approach starting from d-isoascorbic acid as well as evaluation of their free-radical scavenging, antidiabetic, and anti-hyperlipidemic activities. Both putative asperidine B and its desmethyl analogue markedly reduced the total reactive oxygen species (ROS) without
推定的 asperidine B 是一种非天然 2,6-二取代哌啶-3-醇,是 (+)-preussin(一种著名的吡咯烷-3-醇生物碱)的结构异构体。这项工作报告了从d-异抗坏血酸出发,通过 Chiron 方法首次对映选择性合成推定的阿哌啶 B 及其去甲基类似物,并评估了它们的自由基清除、抗糖尿病和抗高血脂活性。推定的阿哌啶 B 及其去甲基类似物均显着降低了肝细胞癌细胞 (HepG2) 中的总活性氧 (ROS),且没有细胞毒性。去甲基类似物是两种抗氧化剂基因表达(谷胱甘肽过氧化物酶和超氧化物歧化酶)的有效诱导剂,而推定的阿哌啶 B 仅诱导超氧化物歧化酶。此外,推定的阿哌啶 B 通过 α-葡萄糖苷酶抑制发挥有效的抗糖尿病活性 (IC 50 = 0.143 ± 0.001 mg/mL),与抗糖尿病药物阿卡波糖相当。与母体 asperidine B (preussin) 一致,推定的 asperidine