Molecules with a helix structure. 3. Sulfur-bridged peri-naphthalenes: synthesis, conformational analysis, and photoelectron spectroscopy of the mono-, di-, and trisulfides of 1,8-dimethylnaphthalene
Hypervalent iodine(III)-mediated C(sp3) H bond arylation, alkylation, and amidation of isothiochroman
作者:Wataru Muramatsu、Kimihiro Nakano
DOI:10.1016/j.tetlet.2014.11.134
日期:2015.1
We have developed a one-step method for introducing aryl, alkyl, and amide groups at the C(1)-position of isothiochromans via an oxidation reaction using hypervalent iodine(III), [bis(trifluoroacetoxy)iodo]benzene (PIFA), followed by an nucleophilic addition reaction using Grignard reagents and an amide.
The first stable tetraarylacenaphthenequinodimethanes exhibiting electrochromism with ‘write-protect’ option: preparation, highly deformed structure, and reversible interconversion with acenaphthylene-5,6-diyl dicationic dyes
Severely deformed title quinodimethanes [1,2-bis(diarylmethylene)acenaphthenes] 1 have been designed and prepared as novel electrochromic materials, which can be reversibly interconverted with the deeply colored dicationic dyes 1(2+) with acenaphthylene-1,2-diyl skeleton. The X-ray analysis of 1 revealed that the inner two aryl groups are forced to overlap in proximity, which can account for the facile electrocyclization process to the isomer. By combination of reversible electrochemical transformation with irreversible isomerization process, the present system provides a prototype for novel molecular response systems equipped with the 'write-protect' option. (c) 2005 Elsevier Ltd. All rights reserved.
Molecules with a helix structure. 3. Sulfur-bridged peri-naphthalenes: synthesis, conformational analysis, and photoelectron spectroscopy of the mono-, di-, and trisulfides of 1,8-dimethylnaphthalene
作者:Hans G. Guttenberger、Hans J. Bestmann、Franz L. Dickert、Flemming S. Jorgensen、James P. Snyder
DOI:10.1021/ja00391a029
日期:1981.1
NAKAYAMA, JUZO;OHSHIMA, ETSUO;ISHII, AKIHIKO;HOSHINO, MASAMATSU, J. ORG. CHEM., 1983, 48, N 1, 60-65