Dynamic asymmetricinduction (DYASIN) of racemic dynamic chiral heterohelicenes afforded their highly enantioenriched forms (up to 96% ep) in quantitative yields. These heterohelicenes were readily converted into semi-static axial-chiral 1,1′-binaphthyl derivatives in a stereospecific manner.
HELICENE DERIVATIVE, AXIALLY ASYMMETRIC AMINO ACID, AMINE OR AMINOALCOHOL DERIVATIVE, PERYLENE DERIVATIVE OR SALT THEREOF, AND METHODS FOR PRODUCING SAME
申请人:Furuta Takumi
公开号:US20110251393A1
公开(公告)日:2011-10-13
The invention provides a helicene derivative, axially chiral amino acid, amine or amino alcohol derivative, and azaperylene, such as compounds represented by Formulae (I), (I′), (II), (II′), and (III):
and a method for producing the same.
A series of aza[n]helicenes (n = 4–7) was synthesized using a photocyclodehydrochlorination of 1-chloro-N-aryl-2-naphthamides as a general synthetic procedure introducing the nitrogen atom to the third ring of the helicene framework. The effect of the nitrogen presence in the helicene skeleton on the physicochemical properties of the prepared aza[n]helicenes was studied and compared to those of the
使用 1-氯-N-芳基-2-萘酰胺的光环脱氯化氢合成一系列氮杂[ n ]螺烯 ( n = 4-7),作为将氮原子引入螺烯骨架第三环的一般合成程序。螺烯骨架中氮的存在对所制备氮杂的理化性质的影响[ n] helicenes 进行了研究并与母体碳类似物进行了比较。将氮原子插入螺旋烯分子的外缘会对某些物理化学性质产生严重影响,例如旋光性、静电势和分子间相互作用。另一方面,与母体碳螺旋烯相比,UV/vis、荧光和磷光光谱等其他一些特性几乎不受影响。氮原子也可用于进一步衍生化,这可导致螺旋烯性质的进一步修饰,如质子化诱导的荧光变化所示。
Ambient Temperature Dehydrogenative C(Ar)–H Carbonylative Lactamization of 2-Arylanilines Using DMF as C1-Source
作者:Yong-Ze Chen、Ting-Hui Ding、Qiang-Qiang Li、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.orglett.3c00585
日期:2023.4.21
dehydrogenative C–H cleaving carbonylative lactamization of 2-arylanilines promoted by visible light and potassium bases is reported. Solvent DMF acts as the sole carbonyl source in the absence of an oxidant. The irreversible release of hydrogen gas drags this reaction to the stable phenanthridinone products. This work provides a direct conversion of a broad range of 2-arylanilines to various phenanthridinones.
Synthesis of Axially Chiral Amino Acid and Amino Alcohols via Additive−Ligand-Free Pd-Catalyzed Domino Coupling Reaction and Subsequent Transformations of the Product Amidoaza[5]helicene
Novel optically active axially chiral amino acid and amino acid and amino alcohols have been synthesized efficiently via lactam ring-opening, with the aid of an optically active alcohol amidoaza[5]helicene 5, which has been readily prepared by an additive-ligand-free Pd catalyzed domino coupling reaction in a single step. The stereostructures of these chiral molecules have also been clarified.