Synthese und Röntgenstruktur einer Triafulvalen-Vorstufe
DOI:
https://doi.org/10.2533/chimia.1992.380Abstract
Triafulvalene precursors 3b and 3c have been synthesized by CuII-catalyzed 'carbene dimerization' of cyclopropyl carbenoids (obtained by halogen-lithium exchange of 1,1-dibromo-2-(phenylthio)-3-(trimethylsilyl)cyclopropane (2b; see Scheme 2) in moderate yields. Diastereoselectivity of the central step 2b → 3b is low. An X-ray analysis of the predominantly formed trans-anti isomer has been performed.
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1992-09-30
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Copyright (c) 1992 Swiss Chemical Society
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How to Cite
[1]
P. Engel, C. Läng, M. Mühlebach, M. Neuenschwander, Chimia 1992, 46, 380, DOI: 10.2533/chimia.1992.380.