Metal-free synthesis of 2-aminonaphthalenes by intramolecular transannulation of 1-sulfonyl-4-(2-alkenylphenyl)-1,2,3-triazoles
作者:Ze-Feng Xu、Xing Yu、Dongdong Yang、Chuan-Ying Li
DOI:10.1039/c7ob00637c
日期:——
A facile metal-free synthesis of 2-aminonaphthalenes by intramolecular transannulation of 1-sulfonyl-4-(2-alkenylphenyl)-1,2,3-triazoles was realized with the proposed ketenimine as the key intermediate.
ruthenium‐catalyzed carbocyclization of 2‐alkynylstyrenes that involves a very rare 1,2‐carbon migration of internal alkynes is reported. Various 1,2‐di ‐and 1,4,7‐trisubstituted naphthalenes are synthesized. Mechanistic studies revealed that this reaction proceeds via a disubstituted vinylidene complex as the key intermediate by 1,2‐carbon migration of the 2‐alkynylstyrenes.
Cationic Au(I)-Catalyzed Cycloisomerization of Aromatic Enynes for the Synthesis of Substituted Naphthalenes
作者:Takanori Shibata、Yasunori Ueno、Kazumasa Kanda
DOI:10.1055/s-2006-926261
日期:——
A cationic Au(I) complex catalyzed the cycloisomerization of aromaticenynes that possess a substituent on their alkyne terminus. Cyclization of the 6-endo-dig type proceeded dominantly to give 1,3-di- and 1,2,3-trisubstituted naphthalenes.
Gold(I)-catalyzed cascade cyclization of 1,4-diyn-3-ones with a pyridine N-oxide enabled direct construction of a benzo[6,7]cyclohepta[1,2-b]furan scaffold with the formation of four bonds. This reaction would proceed through oxidative cyclization, alkynyl migration, and 5-endo-dig type cyclization. Synthesis of benzotropone-fused naphtho[1,2-b]furans through a two-step sequence, including epoxidation
金(I)催化吡啶N-氧化物对1,4-二炔-3-酮的级联环化可直接构建苯并[6,7]环庚[1,2- b ]呋喃骨架,形成四个债券。该反应将通过氧化环化,炔基迁移和5 -endo-dig型环化进行。还介绍了通过两步序列(包括环氧化和In(OTf)3催化的分子内碳-碳键形成)合成苯并萘酮稠合的萘并[1,2- b ]呋喃。
Indium(III)-Catalyzed Cyclization of Aromatic 5-Enynamides: Facile Synthesis of 2-Aminonaphthalenes, 2-Amino-1<i>H</i>-indenes, and 2,3-Dihydro-1<i>H</i>-indeno[2,1-<i>b</i>]pyridines
作者:Ming-Chang P. Yeh、Chia-Jung Liang、Hsiao-Feng Chen、Yu-Ting Weng
DOI:10.1002/adsc.201500449
日期:2015.10.12
efficient synthesis of 2-aminonaphthalenes and 2-amino-1H-indenes from aromatic N-methyl-N-tosyl-ynamides bearing an ortho-vinyl and -isobutenyl group, respectively. The aromatic N-3-arylpropargylynamides bearing an ortho-gem-dihalovinyl subunit underwent a tandem cyclization/carbobromination reaction in the presence of indium tribromide to provide the dibrominated 2,3-dihydro-1H-indeno[2,1-b]pyridine
研究了铟(III)催化的芳香族5-乙酰胺的环化反应。三氟甲磺酸铟能够分别由带有邻-乙烯基和-异丁烯基的芳族N-甲基-N-甲苯磺酰基-酰胺酰胺有效地合成2-氨基萘和2-氨基-1 H-茚。在三溴化铟存在下,带有邻位-二卤代戊二酰基亚基的芳族N -3-芳基炔丙炔基酰胺进行串联环化/碳溴化反应,以提供二溴代的2,3-二氢-1 H-茚并[2,1 - b ]吡啶衍生品收益率高。