Hampel F, van Eikema Hommes N, Hoops S, Maaref F, Schobert R (1998)
Publication Status: Published
Publication Type: Journal article
Publication year: 1998
Publisher: Wiley-VCH Verlag
Pages Range: 1253-1262
Journal Issue: 9
DOI: 10.1002/(SICI)1099-0682(199809)1998:9<1253::AID-EJIC1253>3.0.CO;2-H
Reactions of Cp2Ti(CO)(2) (3) with two equivalents of alpha,beta-unsaturated ketones 4 yield the novel titana-2,9-dioxacyclonona-3,7-dienes 5. Cross-coupling of 3 with two different ketones 4 and 6 to give 7 can be achieved under certain reaction conditions. Hydrolysis of 5 or 7 may generate diketones 9, cyclopentanols 10/11, or cyclopentenes 12/13, depending on substituents and conditions. The X-ray crystal structure of 5a, the first nine-membered bis(eta(5)-cyclopentadienyl)-substituted titanaheterocycle containing carbon, is presented. Ab initio calculations were performed for 5a and for titana-2-oxacyclopentene 1, a conceivable intermediate in the coupling reaction.
APA:
Hampel, F., van Eikema Hommes, N., Hoops, S., Maaref, F., & Schobert, R. (1998). Novel nine-membered titanaheterocycles - Structure, ab initio calculations, and preparative use towards the selective synthesis of substituted cyclopentanols. European Journal of Inorganic Chemistry, 9, 1253-1262. https://dx.doi.org/10.1002/(SICI)1099-0682(199809)1998:9<1253::AID-EJIC1253>3.0.CO;2-H
MLA:
Hampel, Frank, et al. "Novel nine-membered titanaheterocycles - Structure, ab initio calculations, and preparative use towards the selective synthesis of substituted cyclopentanols." European Journal of Inorganic Chemistry 9 (1998): 1253-1262.
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