Disclosed are electrochemical methods to prepare an alkane or an alkene, such as a cis- alkene, from an alkyne, or an alkane from an alkene. The method utilizes an electrochemical cell having a cathode and an anode and a reactor.
The construction of state‐of‐the‐art hole‐transportingmaterials (HTMs) is challenging regarding the appropriate molecular configuration for simultaneously achieving high morphology uniformity and charge mobility, especially because of the lack of appropriate buildingblocks. Herein a semi‐lockedtetrathienylethene (TTE) serves as a promising buildingblock for HTMs by fine‐tuning molecular planarity
Synthesis of New Sulfur Heteroaromatics Isoelectronic with Dibenzo[<i>g</i>,<i>p</i>]chrysene by Photocyclization of Thienyl- and Phenyl-Substituted Ethenes
作者:Erik Fischer、Jan Larsen、Jørn B. Christensen、Marc Fourmigué、Hans G. Madsen、Niels Harrit
DOI:10.1021/jo960022x
日期:1996.1.1
A series of new sulfur heteroarenes, isoelectronic with dibenzo[g,p]chrysene, have been prepared by double photocyclization of the corresponding tetraaryl substituted ethenes. The first step proceeds efficiently in each case, and the corresponding intermediate sulfur heteroarenes, isoelectronic with phenanthrene, have been isolated. The second ring closure is only efficient when one of the participating
regioselectivity by aryl or hetaryl thioketones forming also sterically crowded 2-trimethylsilyl-1,3-dithiolanes. The obtained 1,3-dithiolanes, by treatment with an equimolar amount of TBAF in a one-pot procedure, are converted in high yields into hetaryl/aryl-substituted ethenes or dibenzofulvenes, respectively, via a cycloreversion reaction of the intermediate 1,3-dithiolane carbanion. The presented protocol