Linear Conjugated Systems Bearing Aromatic Terminal Groups. II. The Synthesis and the Electronic Spectra of 9,9′ -Dianthrylpoly-ynes
作者:Shuzo Akiyama、Masazumi Nakagawa
DOI:10.1246/bcsj.43.3561
日期:1970.11
A series of 9,9′-dianthrylpoly-ynes (II1–II6) were prepared, and their electronic spectra were measured. It was found that the novel linear relation between λmax and the square of the number of the triple bond (n2) which has been found in the spectra of 1,1′-dianthrylpoly-ynes (I1–I6) also held in the 9,9′-series.
Intramolecular Diels−Alder Reactions in Ruthenium Vinylidene Complexes Containing Anthracenyl Groups
作者:Shu-Hao Chang、Wen-Ru Tsai、Hao-Wei Ma、Ying-Chih Lin、Shou-Ling Huang、Yi-Hung Liu、Yu Wang
DOI:10.1021/om8011294
日期:2009.3.23
analogous triethylphosphine complex 6′, more electron-donating triethylphosphine ligands lower the rate of the IMDA reaction. For this IMDA reaction in several vinylidenecomplexes, each with a nonchlorinated anthracenyl ligand, the rate of the reaction is accelerated by the presence of an unsaturated functional group at Cγ of the vinylideneligand, particularly by a terminal alkynyl substituent. The solid-state
TfOH-promoted synthesis of indoles and benzofurans involving cyclative transposition of vinyl ketone
作者:Mou Mandal、Rengarajan Balamurugan
DOI:10.1039/d2cc03730k
日期:——
derived from o-alkynylanilines involving a cyclization, retro-aza-Michael reaction and amine trapping cascade is reported here. This atom-economical transformation has been extended to synthesize benzofuran derivatives using analogous vinylogous esters derived from o-alkynylphenols. The excellent stereochemical outcome of the double bond geometry in the products makes it attractive.
using their vinylogous amides under goldcatalysis to access a wide array of benzo[b]azepines in an atom economical way with excellent functional group compatibility. Deuterium scrambling experiments and DFT studies favor a mechanism involving stabilizing conformational change of the initially formed seven-membered vinyl gold intermediate through a key cyclopropyl gold carbene intermediate and its subsequent
已经提出了一种直接闭环策略,该策略涉及用于合成苯并 [ b ] 氮卓类化合物的o -炔基苯胺衍生物的不太容易进行 7-内切-挖掘碳环化。由于氮的高亲核性,在 o -炔基苯胺衍生物中的微不足道的 5-内切环化已被克服,通过在金催化下使用它们的插烯酰胺来获得广泛的苯并[ b ]]azepines 以原子经济的方式具有出色的官能团相容性。氘加扰实验和 DFT 研究支持一种机制,该机制涉及通过关键的环丙基金卡宾中间体稳定最初形成的七元乙烯基金中间体的构象变化及其随后由抗衡阴离子介导的原脱氧反应。