In vitro kinetic study of the squalestatin tetraketide synthase dehydratase reveals the stereochemical course of a fungal highly reducing polyketide synthase
Total Synthesis and Configurational Assignment of Ascospiroketal A
作者:Stanley Chang、Soo Hur、Robert Britton
DOI:10.1002/chem.201502754
日期:2015.11.9
The totalsynthesis of the marine fungus‐derived natural product ascospiroketal is described. This concise synthesis relies on a unique AgI‐promoted tandem cascadecyclization that provides direct access to the correctly configured tricyclic core of the natural product from a linear precursor. The synthesis of candidate stereostructures of ascospiroketal A allowed for the confident assignment of both
Asymmetric Total Syntheses of <i>ent</i>-Ascospiroketals A and B
作者:Jian Wang、Rongbiao Tong
DOI:10.1021/acs.orglett.6b00796
日期:2016.4.15
A new hypothetic biosynthesis of the tricyclic spiroketal core of ascospiroketals A and B is proposed, which guided the development of a novel synthetic strategy for the asymmetric totalsynthesis of ent-ascospiroketals A and B. The synthesis features an efficient ring contraction rearrangement of the 10-membered lactone to the tricyclic spiroketal cis-fused γ-lactone core, which served as the common
提出了一种新的假生物合成方法,即合成螺帽动物A和螺帽B的三环螺帽动物核心,它指导了新的合成策略,用于合成不对称的对映体螺帽动物A和螺帽B。该合成具有有效的10位环收缩重排的特点。成员内酯形成三环螺旋酮体顺式融合的γ-内酯核,这是最后一步通过Stille偶联反应合成对乙酰氨基酮体A和B的通用中间体。另外,7个非对映体准备决定性确认的结构耳鼻喉科-ascospiroketal B.
Enantiomerenreine Pyrrolidin-Derivate austrans-4-Hydroxy-L-prolin durch elektrochemische oxidative Decarboxylierung und Titantetrachlorid-vermittelte Umsetzung mit Nukleophilen
作者:Philippe Renaud、Dieter Seebach
DOI:10.1002/hlca.19860690726
日期:1986.10.29
Enantiomerically Pure Pyrrolidine Derivatives from trans-4-Hydroxy-L-proline by Electrochemical Oxidative Decarboxylation and Titanium-Tetrachloride-Mediated Reaction with Nucleophiles
反式-4-羟基-L-脯氨酸的对映体纯吡咯烷衍生物的电化学氧化脱羧和亲核试剂与四氯化钛介导的反应
In vitro kinetic study of the squalestatin tetraketide synthase dehydratase reveals the stereochemical course of a fungal highly reducing polyketide synthase
作者:Emma Liddle、Alan Scott、Li-Chen Han、David Ivison、Thomas J. Simpson、Christine L. Willis、Russell J. Cox
DOI:10.1039/c6cc10172k
日期:——
The substrate selectivity of the isolated dehydratase (DH) domain of a fungal highly-reducing polyketide synthase is closely related to that of mammalian fatty acid synthase.