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Synthesis and reactivity of iron carbonyl complexes of α,β-unsaturated acyl silanes

Authors
Journal
Tetrahedron
0040-4020
Publisher
Elsevier
Publication Date
Volume
48
Issue
36
Identifiers
DOI: 10.1016/s0040-4020(01)90375-8

Abstract

Abstract 2-Trimethylsilyl-1-oxa-1,3-butadiene ( 7) reacts with Fe 2(CO) 9 to form an unstable tetracarbonyliron(0) complex ( 8) whereas 2-trimethylsilyl-4-phenyl-1-oxa- 1-oxa-1,3-butadiene ( 9) and 2-( tert-butyldimethylsilyl)-4-phenyl-1-oxa-1,3-butadiene ( 20) react with Fe 2(CO) 9 to form highly stable crystalline tricarbonyliron(0) complexes ( 16 and ( 21). Complexes ( 16) and ( 21) both undergo acylation when reacted with methyl lithium under nitrogen to form γ-ketoacylsilanes [( 18) and ( 22)], but only complex ( 21) reacts with methyl lithium under carbon monoxide to give the tricarbonyl(vinylketene)iron(0) complex ( 23).

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