Cyanomethylation of Substituted Fluorenes and Oxindoles with Alkyl Nitriles
作者:Gang Hong、Pradip D. Nahide、Marisa C. Kozlowski
DOI:10.1021/acs.orglett.0c00160
日期:2020.2.21
cyanomethylenation from alkyl nitriles of sp3 C–H bonds to afford quaternary carbon centers is described. This oxidative protocol is operationally simple and features good functional group compatibility. This method provides a novel approach to highly functionalized fluorene and oxindole derivatives, which are commonly used in material and pharmaceutical areas. Control experiments provide evidence of a radical
Nickel-Catalyzed C(sp<sup>3</sup>)–H Arylation of Diarylmethane Derivatives with Aryl Fluorides
作者:Jie Li、Chen Wu、Bihui Zhou、Patrick J. Walsh
DOI:10.1021/acs.joc.8b00016
日期:2018.3.2
A novel nickel-catalyzed C(sp3)–H arylation with nonactivated arylfluorides is reported. The use of 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes) as a ligand was found to be critical to the success of the reaction. This new method enables the synthesis of a wide range of triarylmethane derivatives.
A general and efficient synthesis of substituted fluorenes and heterocycle-fused indenes containing thiophene or indole rings utilizing a Suzuki–Miyaura coupling and acid-catalyzed Friedel–Crafts reactions as key steps
作者:Guijie Li、Erjuan Wang、Haoyi Chen、Hongfeng Li、Yuanhong Liu、Peng George Wang
DOI:10.1016/j.tet.2008.07.021
日期:2008.9
A general and efficient synthesis of fluorenes or heterocycle-fused indenes including 3-thia-cyclopenta[a]indenes, 9-thia-indeno[1,2-a]indenes, 5,6-dihydroindeno[2,1-b]indoles has been developed. This methodology is realized by a multistep protocol involving first preparation of ortho-formylbiaryls through Suzuki–Miyaura coupling of o-bromobenzaldehydes with arylboronic acids or the coupling of aryl
芴或杂环稠合的茚基的一般有效合成方法,包括3-噻吩环戊[ a ]茚,9-噻吩[1,2- a ]茚,5,6-二氢茚并[ 2,1- b ]吲哚已经被开发出来。这种方法是由涉及的第一制备多步协议实现邻-formylbiaryls通过铃木-宫浦耦合的ø-溴苯甲醛与芳基硼酸的结合或芳基卤化物与2-甲酰基苯硼酸的偶联,然后进行Brignard加成反应或Lewis酸催化的Friedel-Crafts环化反应,形成所需的芴或茚环。该方法具有许多优点,例如产率高,选择性高,反应条件温和,起始原料容易获得等。
KHMDS mediated synthesis of 9-arylfluorenes from dibenzothiophene dioxides and arylacetonitriles by tandem S<sub>N</sub>Ar-decyanation-based arylation
作者:Saketh Mylavarapu、Mamta Yadav、M. Bhanuchandra
DOI:10.1039/c8ob02355g
日期:——
A straightforward KHMDS mediated synthetic route to 9-arylfluorenes from readily available starting materials has been developed.
已开发出一种直接的KHMDS介导合成路线,可从易获得的起始材料合成9-芳基芴。
Bethell, Donald; Hare, Gerard J.; Kearney, Paul A., Journal of the Chemical Society. Perkin transactions II, 1981, p. 684 - 691
作者:Bethell, Donald、Hare, Gerard J.、Kearney, Paul A.