Syntheses of Donor–Acceptor-Functionalized Dihydroazulenes
作者:Søren Lindbæk Broman、Martyn Jevric、Andrew D. Bond、Mogens Brøndsted Nielsen
DOI:10.1021/jo4020326
日期:2014.1.3
properties relies on ready access to new derivatives via efficient synthetic protocols. The central DHA core is conveniently prepared in a four-step synthesis starting from acetophenone and tropylium substrates. Here, the outcome of this reaction as a function of the nature of the substituent group on the phenyl unit of acetophenone is investigated in detail. A wide variety of functional groups (nitro, cyano
The dihydroazulene (DHA)/vinylheptafulvene (VHF) photo/thermoswitch has attracted interest as a molecular switch for advanced materials and molecular electronics. We report here two synthetic approaches using palladium catalysis for synthesizing dihydroazulene (DHA) photoswitches with thioacetate anchoring groups intended for molecular electronics applications. The first methodology involves a Suzuki
作者:Anne Ugleholdt Petersen、Martyn Jevric、Richard J. Mandle、Martin Drøhse Kilde、Frederik P. Jørgensen、John W. Goodby、Mogens Brøndsted Nielsen
DOI:10.1071/ch17540
日期:——
An extension of a new method for forming thioesters with mesomorphic properties has been described, whereby the treatment of aryl tert-butylthioethers with long-chain acid chlorides in the presence of bismuth triflate afforded simple derivatives in good yields. This method in the case of 1-cyanoazulenes was, however, complicated by a competitive Friedel–Crafts-type acylation side reaction at the 3-position
including molecules incorporating dithiafulvene, dicyanoethylene, dihydroazulene, fulleropyrrolidine, and triazole units, and successfully subjected to a BiIII promoted conversion into products with thioacetate end-cap(s). The azide group could also withstand these conditions, which allowed us to prepare S-(4-azidophenyl) ethanethioate that presents a convenient building block for subsequent CuAAC reactions