title: Formylborane formation with frustrated Lewis pair templates.
abstract: Boranes R2 BH react with carbon monoxide by forming the respective borane carbonyl compounds R2 BH(CO). The formation of (C6 F5 )2 BH(CO) derived from the Piers borane, HB(C6 F5 )2 , is a typical example. Subsequent CO-hydroboration does not take place, since the formation of the formylborane is usually endothermic. However, an "η(2) -formylborane" was formed by CO-hydroboration with the Piers borane at vicinal phosphane/borane frustrated Lewis pair (FLP) templates. Subsequent treatment with pyridine liberated the intact formylborane from the FLP framework, and (pyridine)(C6 F5 )2 BCHO was then isolated as a stable compound. This product underwent typical reactions of carbonyl compounds, such as Wittig olefination.
authors: Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster (Germany).
authors: Muhammad
authors: M
authors: Sajid
authors: Gerald
authors: G
authors: Kehr
authors: Constantin G
authors: CG
authors: Daniliuc
authors: Gerhard
authors: G
authors: Erker
keywords: aldehydes; boron; carbon monoxide; formylboranes; frustrated Lewis pairs