描述了在快速光解和连续照射下,包括二苯并噻吩核的新的2,2-二苯基-2 H -1-苯并吡喃的合成和光致变色性质。在快速光解下,所有化合物在室温下的溶液中均表现出光致变色行为,但在连续照射下未观察到相同的现象。与参考化合物相比,观察到一般的红移和开放形式的Vis光谱中存在两个吸收带,从而导致吸收范围内出现发色。杂芳基化对光谱动力学参数的影响是可变的,并且取决于稠合的苯并噻吩部分的位置和几何形状。2 H的C(6)中吸电子取代基的作用分析了在7,8位融合了苯并噻吩核的-1-苯并吡喃骨架。
描述了在快速光解和连续照射下,包括二苯并噻吩核的新的2,2-二苯基-2 H -1-苯并吡喃的合成和光致变色性质。在快速光解下,所有化合物在室温下的溶液中均表现出光致变色行为,但在连续照射下未观察到相同的现象。与参考化合物相比,观察到一般的红移和开放形式的Vis光谱中存在两个吸收带,从而导致吸收范围内出现发色。杂芳基化对光谱动力学参数的影响是可变的,并且取决于稠合的苯并噻吩部分的位置和几何形状。2 H的C(6)中吸电子取代基的作用分析了在7,8位融合了苯并噻吩核的-1-苯并吡喃骨架。
Synthesis of Hindered Biaryls via Aryne Addition and <i>in Situ</i> Dimerization
作者:José-Antonio García-López、Meliha Çetin、Michael F. Greaney
DOI:10.1021/acs.orglett.5b01115
日期:2015.6.5
amine nucleophiles. Treatment of the resulting aryl Grignard intermediate with a copper salt and an organic oxidant then affords symmetrical biaryls in good yield. 3-Substituted arynes undergo regioselective addition, enabling synthesis of atropisomeric biaryls with chelating S, Se, or N groups in the 2,2′ positions.
Green Preparation of Dibenzothiophene Derivatives Using 2-Biphenylyl Disulfides in the Presence of Molecular Iodine and Its Application to Dibenzoselenophene Synthesis
作者:Kota Nishino、Yohei Ogiwara、Norio Sakai
DOI:10.1002/ejoc.201701155
日期:2017.10.25
One-pot preparation of dibenzothiophene derivatives by a green method: Dibenzothiophenes are prepared from 2-biphenylyl disulfides by using molecular iodine as an oxidant. This protocol can lead to the direct preparation of dibenzoselenophene.
Palladium(II)-Catalyzed Synthesis of Dibenzothiophenes from 2-Biphenylyl Disulfides by C−H Functionalization
作者:Kota Nishino、Yohei Ogiwara、Norio Sakai
DOI:10.1002/chem.201802475
日期:2018.8.1
The palladium‐catalyzed oxidative preparation of dibenzothiophene derivatives from 2‐biphenylyl disulfides by C−Hfunctionalization is described herein. This procedure shows a high tolerance toward various functional groups and does not require the further addition of a metal oxidant, a base, or a ligand. Also, the present method was applied to the facile preparation of dibenzoselenophene.
Palladium‐catalyzed dualCH functionalization of diarylsulfides to form dibenzothiophenes (DBTs) by oxidative dehydrogenative cyclization is reported. This protocol afforded various DBTs in moderate to good yields with tolerance of a wide variety of substrates. Benzo[1,2‐b:4,5‐b′]bis[b]benzothiophene was successfully synthesized by this method, which was used as an organic semiconductor for field‐effect
据报道,钯通过氧化脱氢环化反应,使二芳基硫醚的双CH官能化形成二苯并噻吩(DBT)。该协议以中等到良好的产量提供了各种DBT,并具有对多种底物的耐受性。通过该方法成功合成了苯并[1,2- b:4,5- b '] bis [ b ]苯并噻吩,用作场效应晶体管的有机半导体。