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。
Selective Monolithiation of Dibromobiaryls Using Microflow Systems
作者:Aiichiro Nagaki、Naofumi Takabayashi、Yutaka Tomida、Jun-ichi Yoshida
DOI:10.1021/ol8015572
日期:2008.9.18
Selective monolithiation of dibromobiaryls, such as 2,2'-dibromobiphenyl, 4,4'-dibromobiphenyl, 2,7-dibromo-9,9-dioctylfluorene, 2,2'-dibromo-1,1'-binaphthyl, and 5,5'-dibromo-2,2'-bithiophene, with 1 equiv of n-butyllithium followed by the reaction with electrophiles was achieved using a microflow system by virtue of fast micromixing and precise temperature control. Sequential introduction of two
Disclosed is an electroluminescent device comprising a light-emitting layer containing a light emitting phosphorescent material that contains an organometallic complex comprising a metal selected from the group consisting of Mo, W, Re, Ru, and Os that is coordinated to a neutral or negatively-charged ligand group through the π electrons of the ligand with a hapticity greater than 2. The device provides useful light emissions.
Photocatalytic dehydrogenated etherification of 2-aryl benzylic alcohols
作者:Zhihui Liang、Chao Liu、Jiajun Fan、Mingze Wang、Xuanyu Yan、Mingqiang Huang、Shunyou Cai
DOI:10.1039/d2gc02030k
日期:——
we describe an efficient and practical method for the conversion of 2-aryl benzylic alcohols into the corresponding chromenes through visible-light-induced photoredox catalysis. This protocol has been applied to a wide range of benzylic alcohols, involving pharmaceuticals and natural products, with the synergistic interactions of 2-bromoanthraquinone, O2, nBu4NBr and K2CO3 in EtOH under visible-light
在这里,我们描述了一种通过可见光诱导的光氧化还原催化将 2-芳基苯甲醇转化为相应色烯的有效且实用的方法。该协议已应用于广泛的苯甲醇,包括药物和天然产物,在可见光照射下,2-溴蒽醌、O 2、n Bu 4 NBr 和 K 2 CO 3在 EtOH 中具有协同作用。该协议在结构复杂的 6 H-苯并[ c ]色烯合成中的后期应用证明了其合成效用。