Synthesis of Dibenzothiophenes and Related Classes of Heterocycles by Using Functionalized Dithiocarbamates
作者:Marcel Kienle、Andreas Unsinn、Paul Knochel
DOI:10.1002/anie.201001025
日期:2010.6.28
A round trip: Readily available dithiocarbamates can undergo ringclosure to give functionalized sulfurheterocycles (see scheme). These heteroaromatic compounds can be further functionalized by directed alumination and subsequently trapped with various electrophiles.
benzosiloles is accomplished by 2-fold metalation of benzo[b]thiophenes substituted at C3 with ortho-brominated aryl groups followed by electrophilic substitution with dichlorosilanes. The method relies on the innate acidity of the C(sp2)–H bond at C2 of benzo[b]thiophenes and the halogen–metal exchange of the proximal C(sp2)–Br bond. The related indole- and benzofuran-annulated systems are also accessible
各种噻吩稠合的苯并甲酚的直接组装是通过在C3处用邻溴化的芳基进行2倍苯并[ b ]噻吩的2倍金属化,然后用二氯硅烷进行亲电取代来实现的。该方法依赖于苯并[ b ]噻吩的C2处C(sp 2)-H键的固有酸度和近端C(sp 2)-Br键的卤素-金属交换。也可以使用相关的吲哚和苯并呋喃环化的系统,但是这些硅烷的化学稳定性较差。还包括噻吩稠合的苯并germol的例子。
Novel Heterocyclic Host Materials
申请人:Ma Bin
公开号:US20130175507A1
公开(公告)日:2013-07-11
Novel heterocyclic materials are disclosed. The materials contain a fused tetracyclic structure that can improve the properties of OLED devices when the novel heterocyclic materials are incorporated into such devices.
Novel heterocyclic materials are disclosed. The materials contain a fused tetracyclic structure that can improve the properties of OLED devices when the novel heterocyclic materials are incorporated into such devices