Synthesis of Structurally Modified Atropisomeric Biaryl Dithiols. Observations on the Newman-Kwart Rearrangement
摘要:
The preparation of a number of biaryldithiols from biaryldiols is discussed. A key reaction is the Newman-Kwart thermorearrangement of bisthiocarbamates and crucial variables of temperature and reaction time have been identified. Alternative approaches to 3,3'-disubstituted dithiols via ortho metallation are presented, The benefit of using such disubstituted compounds is illustrated with representative examples of the stereochemical features of the derived carbanions in reactions with prochiral electrophiles. (C) 1997 Published by Elsevier Science Ltd.
Pd-catalyzed C-H annulation reactions of halo- and aryl-heteroarenes were developed using readily available o-bromobiaryls and o-dibromoaryls, respectively. A variety of five-membered heteroarenes rapidly provided the corresponding phenanthrene-fused heteroarenes, which led to the identification of phenanthro-pyrazole and thiazole as new, stable -2 V redox couples. The flexible syntheses and tunability
9-Stannafluorenes: 1,4-Dimetal Equivalents for Aromatic Annulation by Double Cross-Coupling
作者:Ikuhiro Nagao、Masaki Shimizu、Tamejiro Hiyama
DOI:10.1002/anie.200903779
日期:2009.9.28
Double or nothing! A straightforward and high‐yielding approach to a variety of polycyclic aromatic hydrocarbons has been achieved through palladium‐catalyzed annulation of 9,9‐dimethyl‐9‐stannafluorenes and dithienostannole with 1,2‐dihaloarenes (see scheme). In addition, 1,1‐dibromo‐1‐alkenes can also be applied to this annulation to produce dibenzofulvenes in excellent yields.
Accessing π‐expanded heterocyclics beyond dibenzothiophene: Syntheses and properties of phenanthrothiophenes
作者:Samala Venkateswarlu、Suhendro Purbo Prakoso、Sushil Kumar、Yu‐Tai Tao
DOI:10.1002/jccs.201900509
日期:2020.3
A series of phenanthrothiophenes are designed and synthesized from polyarylthiophenes through regioselective Scholl reactions in one step using iron chloride as catalyst. The molecular structures of these heteroarenes displayed multiple twisted fjords, which perturb the shapes of the polycyclic frameworks to pack in slipped to near‐perfect face‐to‐face styles in parallel or antiparallel packings. Field‐effect
使用氯化铁作为催化剂,通过区域选择性的Scholl反应,由聚芳基噻吩设计并合成了一系列的噻吩噻吩。这些杂芳烃的分子结构显示出多个扭曲的峡湾,扰乱了多环骨架的形状,以平行或反平行堆积的方式滑移至接近完美的面对面样式。使用6,12-二氟联菲[9,10-b:9',10']噻吩单晶的场效应晶体管器件的空穴迁移率为0.22 cm 2 V -1 s -1。
신규 화합물, 이의 제조 방법 및 신규 화합물을 포함하는 레독스 플로우 전지용 음극 활물질, 이를 포함하는 레독스 플로우 전지
申请人:Pusan National University Industry-University Cooperation Foundation 부산대학교 산학협력단(220040044843) BRN ▼621-82-06530
公开号:KR20210099840A
公开(公告)日:2021-08-13
본 발명은 레독스 안정성이 우수하고 낮은 환원 전위를 갖는 신규 화합물, 이의 제조 방법 및 신규 화합물을 포함하는 레독스 플로우 전지용 음극 활물질, 이를 포함하는 레독스 플로우 전지에 관한 것으로, 본 발명의 신규 화합물은 하기 화학식 1로 표시된다. [화학식 1] 상기 화학식 1에서, het는 적어도 하나의 헤테로 원자를 함유하는 오각 헤테로고리 또는 오각 접합 헤테로고리이고, R, R 및 R는 서로 동일하거나, 상이한 치환기이다.