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DOI: 10.1055/s-2001-16755
Effective Synthesis of 1,3-Diselenole-2-selone-4,5-diselenolate (dsis) and its Utilization for the Synthesis of Selenocycle-fused Tetraselenafulvalene (TSF) Derivatives
Publication History
Publication Date:
12 August 2004 (online)
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Abstract
A facile and effective synthetic procedure for 1,3-diselenole-2-selone-4,5-diselenolate (dsis, 2) has been established. The utilization of 2 for the synthesis of selenocycle-fused tetraselenafulvalene derivatives is also reported.
Key words
lithiation - diselenolate ligands - protecting groups - ring-closure reaction - selenium-containing heterocycles
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(c) Essentially there should be no difference between cyanoethyl- and methoxycarbonylethyl- groups as a protecting group for thiolate or selenolate. However, in case of TSF selenolate derivatives, incorporation of cyanoethyl groups often leads to a serious decrease of solubility, making the subsequent deprotection/realkylation protocol difficult. Thus, we prefer the methoxycarbonylethyl group as a protecting group for the TSF selenolates.
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