Diels–Alder Construction of Regiodifferentiated meta-Amino Phenols and Derivatives
摘要:
Synthetic access to regiodifferentiated meta-amino phenols is described. The strategy relies upon distinct deprotonation conditions to afford regioisomeric thermodynamic and kinetic dienes that undergo a tandem Diels-Alder and retro-Diels-Alder sequence with assorted acetylenic dienophiles to afford a range of aromatic products.
Pyrrole acetylenecarbaldehydes: an entry to a novel class of functionalized pyrroles
作者:Maxim D. Gotsko、Lyubov N. Sobenina、Denis N. Tomilin、Marina V. Markova、Igor A. Ushakov、Tamara I. Vakul’skaya、Spartak S. Khutsishvili、Boris A. Trofimov
DOI:10.1016/j.tetlet.2016.09.079
日期:2016.11
The first representatives of a previously unknown class of highly reactive functionalized pyrrole compounds, 3-(pyrrol-2-yl)propiolaldehydes, have been synthesized by the transition metal-free, mechanoactivated ethynylation of pyrroles with 3-iodopropiolaldehyde using a solid K2CO3 medium under mild conditions (room temperature, 4 h) in yields of up to 71%.
Transition metal-free cross-coupling of furan ring with haloacetylenes
作者:Lyubov N. Sobenina、Denis N. Tomilin、Maxim D. Gotsko、Igor A. Ushakov、Boris A. Trofimov
DOI:10.1016/j.tet.2018.02.024
日期:2018.3
menthofuran, a naturally abundant compound, it has been shown for the first time that the furanring can be readily cross-coupled with acylhaloacetylenes in the solid Al2O3 powder at room temperature to afford the corresponding 2-ethynyl derivatives in up to 88% yield. The reaction represents a ring closing/ring opening process that includes reversible formation of the intermediate cycloadducts further
以天然丰富的化合物薄荷呋喃为例,首次证明呋喃环可以在室温下与固体Al 2 O 3粉末中的酰卤乙炔很容易地交叉偶联,得到相应的2-乙炔基衍生物产率高达 88%。该反应代表闭环/开环过程,包括中间体环加合物的可逆形成,进一步产生乙炔衍生物并消除HHal。
Gorgues,A., Bulletin de la Societe Chimique de France, 1974, p. 529 - 530
作者:Gorgues,A.
DOI:——
日期:——
Conjugate Addition to Acylketene Acetals Derived from 1,8-Dihydroxynaphthalene and Its Application To Synthesize the Proposed Structure of Spiropreussione A
作者:Hirokazu Tsukamoto、Yumi Nomura、Koichi Fujiwara、Shogo Hanada、Takayuki Doi
DOI:10.1021/acs.orglett.8b01259
日期:2018.5.18
A conjugate addition of diverse nucleophiles to acylketene acetals derived from 1,8-dihydroxynaphthalene (DHN) is developed for the formation of its 3-oxoalkan-1-one acetals. The initial acylketene acetals are prepared via double oxa-Michael addition of DHN to 1-bromo-1-propyn-3-ones. Carbonucleophiles, including organocopper reagents and active methylene compounds, and heteroatom nucleophiles were
Diels–Alder Construction of Regiodifferentiated <i>meta</i>-Amino Phenols and Derivatives
作者:Marisa G. Weaver、Wen-Ju Bai、Stephen K. Jackson、Thomas R. R. Pettus
DOI:10.1021/ol4034447
日期:2014.3.7
Synthetic access to regiodifferentiated meta-amino phenols is described. The strategy relies upon distinct deprotonation conditions to afford regioisomeric thermodynamic and kinetic dienes that undergo a tandem Diels-Alder and retro-Diels-Alder sequence with assorted acetylenic dienophiles to afford a range of aromatic products.