One-pot synthesis of phthalides via regioselective intramolecular cyclization from ortho-alkynylbenzaldehydes
摘要:
A one-pot synthesis of phthalides via an intramolecular 5-exo-dig cyclization of ortho-alkynylbenzaldehydes under mild NaClO2 oxidation conditions is described. (C) 2010 Elsevier Ltd. All rights reserved.
Silver-Catalyzed Domino Hydroarylation/Cycloisomerization Reactions of ortho-Alkynylbenzaldehydes: An Entry to Functionalized Isochromene Derivatives
摘要:
A Ag-catalyzed versatile and efficient access to 1H,1-arylisochromenes is reported. Starting from ortho-alkynylbenzaldehydes bearing various substitution patterns on the benzaldehyde and alkynyl units, the use of silver triflate (10 mol %) allowed a domino hydroarylation/cycloisomerization reaction process, leading to aryl-functionalized 1H-isochromene (>10 compounds, 80-98% yields). Notably, the reaction conditions were also compatible with benzaldehydes bearing an aliphatic-substituted alkynyl moiety with modest to good yields (34-88%, 10 compounds).
The first transition-metal-free synthesis of 2,3-diarylindenones with tunable selectivity via tandem annulation of 2-alkynylbenzaldehydes with phenols has been developed.
Synthesis of 3-aminoindenes and <i>cis</i>-1-aminoindanes by Zn(OTf)<sub>2</sub>-catalyzed cyclization of <i>o</i>-alkynylbenzaldehydes with tertiary alkyl primary amines
作者:Tuanli Yao、Rui Zhu、Tao Liu
DOI:10.1039/d3cc04180h
日期:——
Using Zn(OTf)2 as catalyst, a highly regio- and chemo-selective cyclocarboamination of o-alkynylbenzaldehydes with tertiaryalkylprimaryamines was realized to access 3-aminoindenes with different substitution patterns from previously reported methods. The full reduction of the iminoindenone intermediates affords cis-1-amino-2-arylindanes with excellent diastereoselectivity. Mechanistically, the reaction
Silver-Catalyzed Domino Hydroarylation/Cycloisomerization Reactions of <i>ortho</i>-Alkynylbenzaldehydes: An Entry to Functionalized Isochromene Derivatives
作者:Gaëlle Mariaule、Gregory Newsome、Patrick Y. Toullec、Philippe Belmont、Véronique Michelet
DOI:10.1021/ol5021256
日期:2014.9.5
A Ag-catalyzed versatile and efficient access to 1H,1-arylisochromenes is reported. Starting from ortho-alkynylbenzaldehydes bearing various substitution patterns on the benzaldehyde and alkynyl units, the use of silver triflate (10 mol %) allowed a domino hydroarylation/cycloisomerization reaction process, leading to aryl-functionalized 1H-isochromene (>10 compounds, 80-98% yields). Notably, the reaction conditions were also compatible with benzaldehydes bearing an aliphatic-substituted alkynyl moiety with modest to good yields (34-88%, 10 compounds).
One-pot synthesis of phthalides via regioselective intramolecular cyclization from ortho-alkynylbenzaldehydes
作者:Jim Li、Elbert Chin、Alfred S. Lui、Lijing Chen
DOI:10.1016/j.tetlet.2010.09.023
日期:2010.11
A one-pot synthesis of phthalides via an intramolecular 5-exo-dig cyclization of ortho-alkynylbenzaldehydes under mild NaClO2 oxidation conditions is described. (C) 2010 Elsevier Ltd. All rights reserved.