Combining phosphinidene units with malonate anion: Synthesis of highly functional phosphine complexes

Abstract

Abstract Malonate anion traps the [RP‐W(CO) 5 ] bridge of 7‐phosphanorbornadiene complexes 1–3 to give functional secondary phosphine complexes [RP(H)‐CH(CO 2 Et) 2 ]W(CO) 5 ( 7–9 ). Metalation of these complexes by NaH in THF occurs at the malonic CH group, but the alkylation of the resulting carbanions preferentially takes place at phosphorus. When R stands for β‐chloroethyl, the corresponding carbanion cyclizes to give the functional phosphirane complex 11 . © 2004 Wiley Periodicals, Inc. Heteroatom Chem 15:258–262, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20014