Regioselective Synthesis of 2-(Aryloxythio)benzoates by the First [3+3] Cyclizations of 3-Aryloxythio-1-silyloxybuta-1,3-dienes with 3-Alkoxy-2-en-1-ones
Functionalized 2-(aryloxythio)benzoates were regioselectively prepared by the first [3+3] cyclizations of 3-aryloxythio-1-trimethylsilyloxybuta-1,3-dienes with 3-alkoxy-2-en-1-ones. cyclizations - diaryl sulfides - regioselectivity - pyridines - silyl enol ethers
Synthesis of Functionalized Biaryls Based on a Heck Cross-Coupling-[3+3] Cyclization Strategy
作者:Peter Langer、Gerson Mroß、Helmut Reinke
DOI:10.1055/s-2008-1072654
日期:——
6-Arylsalicylates were regioselectively prepared by formal [3+3] cyclization of 1,3-bis(silyloxy)-1,3-butadienes with 1-aryl-3-ethoxyprop-2-en-1-ones which are available by Heck reaction of benzoyl chlorides with ethylvinyl ether. In this context, the first [3+3] cyclizations of brominated substrates are reported.
The formal [3+3] cyclization of 1,3-bis(silyloxy)buta-1,3-dienes with 1-aryl-3-ethoxyprop-2-en-1-ones, available by Heck reaction of benzoyl chlorides with ethyl vinyl ether, afforded a variety of 6-arylsalicylates. The reaction of the products with concentrated sulfuric acid resulted in the formation of fluorenones. 6-Alkylsalicylates were prepared by cyclization of 1,3-bis(silyloxy)buta-1,3-dienes
Efficient palladium-catalyzed Suzuki cross-coupling reaction with β-ketoamine ligands
作者:Zong-Zhou Zhou、Feng-Shou Liu、Dong-Sheng Shen、Cheng Tan、Ling-Yan Luo
DOI:10.1016/j.inoche.2011.01.044
日期:2011.5
electronic substituents on the backbone and with aniline moieties have been synthesized and characterized. In the presence of PdCl2, catalytic studies indicated that they are effective ligands for Suzukicross-coupling of various aryl bromides with phenylboronic acid, under aerobic conditions.
ZnCl2-promoted Friedländer-type synthesis of 4-substituted 3-aroyl quinolines from o-aminoaryl ketones and enaminones
作者:Laichun Luo、Zongbao Zhou、Jiayi Zhu、Xue Lu、Hong Wang
DOI:10.1016/j.tetlet.2016.09.087
日期:2016.11
A practical synthesis of 4-substituted 3-aroyl quinolines via Friedländer-type reaction from readily available o-aminoaryl ketones and enaminones was developed. In the presence of ZnCl2, the reaction proceeded smoothly affording the desired products with various functional groups in moderate to good yields.