Synthesis of (-)-Δ<sup>9</sup>-<i>trans</i>-Tetrahydrocannabinol: Stereocontrol via Mo-Catalyzed Asymmetric Allylic Alkylation Reaction
作者:Barry M. Trost、Kalindi Dogra
DOI:10.1021/ol063022k
日期:2007.3.1
[reaction: see text] Delta9-THC is synthesized in enantiomericaly pure form, where all of the stereochemistry is derived from the molybdenum-catalyzedasymmetricalkylation reaction of the extremely sterically congested bis-ortho-substituted cinnamyl carbonate in high regio- and enantioselectivity.
Ring-Closing Metathesis Reactions on Azinium Salts: Straightforward Access to Quinolizinium Cations and Their Dihydro Derivatives
作者:Ana Nuñez、Beatriz Abarca、Ana M. Cuadro、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1021/jo900292b
日期:2009.6.5
proved to be an efficient approach to 3,4-dihydro- and 1,2-dihydroquinolizinium salts and the corresponding quinolizinium derivatives by an improved thermal oxidation in the presence of Pd/C without solvent. A comparative study showed that the quinolizinium system was obtained in better yields through the 3,4-dihydroquinolizinium route, thus allowing the synthesis of quinolizinium derivatives or improvements
Synthesis and Multiplexed Activity Profiling of Synthetic Acylphloroglucinol Scaffolds
作者:Jonathan H. Boyce、Benjamin J. Reisman、Brian O. Bachmann、John A. Porco
DOI:10.1002/anie.202010338
日期:2021.1.18
formic‐acid‐mediated rearrangements of dearomatized acylphloroglucinols to access a structurally diverse group of synthetic acylphloroglucinol scaffolds (SASs). Density‐functional theory (DFT) optimized orbital and stereochemical analyses shed light on the mechanism of these rearrangements. Products were evaluated by multiplexed activity profiling (MAP), an unbiased platform which assays multiple biological readouts
Enyne ring-closing metathesis on heteroaromatic cations
作者:Ana Núñez、Ana M. Cuadro、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1039/b602420c
日期:——
Cationic heteroaromatic enynes have been employed as substrates in enyne ring-closing metathesis, under an atmosphere of ethylene and using the Hoveyda-Grubbs catalyst, for the first time; the reaction affords new 1-vinyl- and 2-vinyl-substituted 3,4-dihydroquinolizinium salts, useful precursors for biologically relevant cations based on the quinolinizium system.
Regiodivergent Photocyclization of Dearomatized Acylphloroglucinols: Asymmetric Syntheses of (−)-Nemorosone and (−)-6-<i>epi</i>-Garcimultiflorone A
作者:Saishuai Wen、Jonathan H. Boyce、Sunil K. Kandappa、Jayaraman Sivaguru、John A. Porco
DOI:10.1021/jacs.9b05600
日期:2019.7.17
Regiodivergent photocyclization of dearomatized acylphloroglucinol substrates has been developed to produce type A polycyclic polyprenylated acylphloroglucinol (PPAP) derivatives using an excited-state intramolecular proton transfer (ESIPT) process. Using this strategy, we achieved the enantioselective total syntheses of the type A PPAPs (-)-nemorosone and (-)-6- epi-garcimultiflorone A. Diverse photocyclization
已开发出脱芳构化酰基间苯三酚底物的区域发散光环化,以使用激发态分子内质子转移 (ESIPT) 过程生产 A 型多环聚异戊二烯化酰基间苯三酚 (PPAP) 衍生物。使用这种策略,我们实现了 A 型 PPAPs (-)-nemorosone 和 (-)-6-epi-garcimultiflorone A 的对映选择性全合成。 已经研究了不同的光环化底物,导致不同的光环化过程作为系绳长度的函数。进行了光物理研究,并基于对各种底物的研究以及氘标记实验提出了光环化机制。