Regioselective Stille coupling reactions of 3,5-dibromo-2-pyrone with various aryl and vinyl stannanes
作者:Won-Suk Kim、Hyung-Jin Kim、Cheon-Gyu Cho
DOI:10.1016/s0040-4039(02)02305-5
日期:2002.12
regioselective Stille coupling reactions with aryl, heteroaryl and vinyl stannanes to produce various 3-substituted, 5-bromo-2-pyrones. Addition of a catalytic amount of CuI greatly increased the selectivity and chemical yield of the desired 3-aryl-5-bromo-2-pyrone. Second Stille coupling reactions on the resulting 3-aryl-2-pyrones gave rise to a series of potentially useful 2-pyrones with two different functionalities
Regiocontrolled Suzuki-Miyaura Couplings of 3,5-Dibromo-2-pyrone
作者:Cheon-Gyu Cho、Ki-Moon Ryu、Arun Kumar Gupta、Jin Wook Han、Chang Ho Oh
DOI:10.1055/s-2004-831311
日期:——
In a similar way to its Stille coupling reactions, 3,5-dibromo-2-pyrone undergoes the Suzuki-Miyaura coupling reactions at either the C3- or the C5-position with high regioselectivity depending on the reaction conditions.
A Unified Strategy for the Enantiospecific Total Synthesis of Delavatine A and Formal Synthesis of Incarviatone A
作者:Vignesh Palani、Cedric L. Hugelshofer、Richmond Sarpong
DOI:10.1021/jacs.9b07693
日期:2019.9.11
enabled a short synthesis of delavatine A and a formal synthe-sis of incarviatone A, which are two likely biosynthetically related naturalproducts. The indane core of these natural prod-ucts was constructed through a cascade sequence involving five transformations that occur in a single pot. Leveraging sym-metry has allowed us to trace both naturalproducts back to a versatile buildingblock, 3,5-dibromo-2-pyrone
我们描述了一种受对称启发的合成方法,该方法使 delavine A 的短合成和 incarviatone A 的正式合成成为可能,这是两种可能与生物合成相关的天然产物。这些天然产品的茚满核心是通过级联序列构建的,涉及在单个罐中发生的五个转化。利用对称性,我们可以将这两种天然产物追溯到多功能构件 3,5-二溴-2-吡喃酮,并描述了与该多卤化杂环的位点选择性交叉偶联相关的研究。此外,我们的策略提供了一种假定的生物遗传前体,从中尝试合成两种天然产物。
Stille couplings of 3-(trimethylstannyl)-5-bromo-2-pyrone for the syntheses of 3-aryl-5-bromo-2-pyrones and their ambident dienyl characters
作者:Jin-Hee Lee、Won-Suk Kim、Young Yiol Lee、Cheon-Gyu Cho
DOI:10.1016/s0040-4039(02)01182-6
日期:2002.8
3-(Trimethylstannyl)-5-bromo-2-pyrone underwent facile Stille Coupling reactions with aryl halides to produce various 3-substituted 5-bromo-2-pyrones. The resulting 3-aryl-2-pyrone derivatives underwent both normal and inverse electron demand Diels Alder cycloadditions depending on the type of the dienophiles being reacted. (C) 2002 Elsevier Science Ltd. All rights reserved.
A Short Synthesis of Delavatine A Unveils New Insights into Site-Selective Cross-Coupling of 3,5-Dibromo-2-pyrone
作者:Vignesh Palani、Cedric L. Hugelshofer、Ilia Kevlishvili、Peng Liu、Richmond Sarpong
DOI:10.1021/jacs.8b13012
日期:2019.2.13
The recognition of latent symmetry in delavatine A has enabled a short synthesis of the natural product starting from 3,5,dibromo-2-pyrone. The concise synthetic route features a cascade process involving a 6 pi electrocyclization to construct the indane core of delavatine A. In addition, we have conducted detailed experimental and computational studies to gain an in-depth understanding of the mechanism of the observed site-selective cross-coupling of 3,5-dibromo-2-pyrone. This insight may provide new avenues to achieve the selective cross-coupling of multiply halogenated heteroarenes.