Synthesis of diaryl selenides using the in situ reagent SeCl2
作者:Sanjio S. Zade、Snigdha Panda、Harkesh B. Singh、Gotthelf Wolmershäuser
DOI:10.1016/j.tetlet.2004.11.125
日期:2005.1
Reactions of in situ prepared SeCl2 With Grignard reagents (prepared from bromobenzene, o-tolyl bromide, 2,6-dimethyl-4-tert-butyl-l-bromobenzene, and 1-bromo-2-methylnaphthalene) and dilithiated benzamides (prepared from N-phenyl, N-cyclohexyl, and N-isopropyl benzamide) are described. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis, reactivity, electrochemical and crystallographic studies of diferrocenoyl diselenide and ferrocenoyl selenides
作者:Sangit Kumar、Santosh K. Tripathi、Harkesh B. Singh、Gotthelf Wolmershäuser
DOI:10.1016/j.jorganchem.2004.06.054
日期:2004.9
Diacyl diselenide (8), diacyl selenide (9) and acyl selenol esters (10-12) incorporating the ferrocenoyl substituent have been synthesized from ferrocene carboxylic acid (13). The new compounds (8-10) have been characterized by multinuclear NMR (H-1, C-13, Se-77), IR spectroscopy and electrospray mass spectrometry. All compounds (8-13) undergo a one electron reversible oxidation at significantly more positive potential than ferrocene. The structures of the diselenide and selenide (8 and 10) have been confirmed by single crystal X-ray diffraction. The absolute structure parameter of 8 indicates that it crystallizes in an enan-tiomerically pure form. The peroxidase-like activities of the diselenide (8) and selenides (9-12) have been determined by the thiol assay. (C) 2004 Elsevier B.V. All rights reserved.