Abstract
2,6-Dimercapto-1,3-diethoxycarbonylazulene, a rare example of an unsymmetrical dimercaptoarene, was efficiently synthesized via two routes from common azulenic precursors. The SH-termini of this linear nonbenzenoid dimercaptan exhibit markedly different acidities, which permitted exclusively regioselective metallation of its 6-SH end with the [PPh3PAuI] fragment to afford the only mononuclear adduct (10) of a dimercaptoarene known to date. Subsequent metallation of the 2-SH terminus of 10 with another equivalent of [PPh3PAuI] gave the corresponding dinuclear AuI complex featuring the 2,6-azulenedithiolate linker. The complex constitutes a unique unsymmetrical platform for probing the exchange of gold-bound thiolates within a single compound.
Original language | English (US) |
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Pages (from-to) | 4267-4272 |
Number of pages | 6 |
Journal | Chemical Science |
Volume | 4 |
Issue number | 11 |
DOIs | |
State | Published - Sep 30 2013 |