A copper-catalyzed cyclization reaction of trifluoromethyl-containing ortho-halo-β-chlorostyrenes with ketones has been developed. Using a combination of copper(I) bromide, 2,2,6,6-tetramethylheptane-3,5-dione and sodium tert-butoxide, a variety of 4-trifluoromethylbenzoxepines was prepared in moderate to good yields by the tandem α-alkenylation of ketones with subsequent O-arylation.
Copper-Catalyzed Thiolation Annulations of 1,4-Dihalides with Sulfides Leading to 2-Trifluoromethyl Benzothiophenes and Benzothiazoles
作者:Chun-Lin Li、Xing-Guo Zhang、Ri-Yuan Tang、Ping Zhong、Jin-Heng Li
DOI:10.1021/jo101675f
日期:2010.10.15
thiolation reaction of 1,4-dihalides with sulfides has been developed for selectively synthesizing 2-trifluoromethyl benzothiophenes and benzothiazoles. In the presence of CuI, a variety of 2-halo-1-(2-haloaryl)-3,3,3-trifluoropropylenes smoothly underwent the thiolation annulation with Na2S to afford 2-trifluoromethyl benzothiophenes in moderate to good yields. Moreover, the conditions are compatible with
已经开发出铜催化的1,4-二卤化物与硫化物的双硫醇化反应,用于选择性合成2-三氟甲基苯并噻吩和苯并噻唑。在CuI存在下,各种2-卤代-1-(2-卤代芳基)-3,3,3-三氟丙烯顺利地与Na 2 S进行硫醇化环化反应,以中等至良好的产率得到2-三氟甲基苯并噻吩。此外,在NaHS和K 3 PO 4的存在下,该条件与N-(2-卤代芳基)三氟乙酰亚氨基酰氯是相容的,从而产生了2-三氟甲基苯并噻唑。
Synthesis of 1-Substituted 2-(Trifluoromethyl)indoles via a Palladium-Catalyzed Double Amination Reaction
A new, selective protocol for the synthesis of 1-substituted 2-(trifluoromethyl)indoles has been developed by palladium-catalyzed double amination reaction of 2-chloro-1-(2-halophenyl)-3,3,3-trifluoroprop-1-enes with primary amines. This route allows the formation of two C-N bonds in one pot from the reaction between 2-chloro-1-(2-halophenyl)-3,3,3-trifluoroprop-1-enes and primary amines using the
通过钯催化2-氯-1-(2-卤代苯基)-3,3,3-三氟丙-1的双胺化反应,开发了一种新的选择性合成1-取代的2-(三氟甲基)吲哚的方案。 -与伯胺的烯。该路线允许使用Pd 2(dba)3在2-氯-1-(2-卤代苯基)-3,3,3-三氟丙-1-烯与伯胺之间的反应中在一个罐中形成两个CN键/ L4 / t -BuONa系统。 钯-双胺-2-氯-1-(2-卤代苯基)-3,3,3-三氟丙-1-烯-2-(三氟甲基)吲哚
Ni-Catalyzed Reductive Arylalkenylation of Alkynes for the Selective Synthesis of Polysubstituted Naphthalenes
alkynes with 1-bromo-2-(2-chlorovinyl)arenes in the presence of zinc powder has been developed. This base-free cyclization provides a novel protocol for the selective synthesis of 2-trifluoromethyl naphthalenes and ethyl 2-naphthoates from simple starting materials in moderate to good yields with excellent tolerance of functional groups.
已经开发了在锌粉存在下用 1-溴-2-(2-氯乙烯基)芳烃对炔烃进行 Ni 催化的还原芳基烯基化反应。这种无碱基环化为从简单的起始原料选择性合成 2-三氟甲基萘和 2-萘甲酸乙酯提供了一种新的方案,其产率中等至良好,并且对官能团具有出色的耐受性。
Synthesis of Trifluoromethylated Dibenzoxepines via Palladium-Catalyzed Tandem C–O Bond Formation/C–H Arylation
作者:Zhi-Yi Zhao、Xing-Guo Zhang、Hai-Yong Tu
DOI:10.1021/acs.joc.3c01770
日期:2023.10.6
palladium-catalyzed cyclization reaction of phenols with trifluoromethyl-containing ortho-bromo-β-chlorostyrenes has been developed. In the presence of palladium(II) acetate, tricyclohexylphosphine, and cesium carbonate, a variety of 6-trifluoromethyldibenzo[b,d]oxepines were prepared in moderate to good yields through the tandem O-alkenylation of general phenols and subsequent C–H arylation.
已开发出钯催化的苯酚与含三氟甲基的邻-溴-β-氯苯乙烯的环化反应。在乙酸钯(II)、三环己基膦和碳酸铯存在下,通过一般酚类的串联 O-烯基化和随后的 C-H 芳基化,以中等至良好的产率制备了多种 6-三氟甲基二苯并[ b , d ]氧杂环己烷。