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Reactions of Functional Groups at the Periphery of Group 4 Metallocene Frameworks: Selective Formation of a Cp-Bonded Azaboretidine Derivative by a Hydroboration Route

✍ Scribed by Doris Kunz; Gerhard Erker; Roland Fröhlich; Gerald Kehr

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 366 KB
Volume: 2000
Category: Article
ISSN: 1434-1948
DOI: 10.1002/(sici)1099-0682(200003)2000:3<409::aid-ejic409>3.0.co;2-6

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✦ Synopsis

6-Amino-6-methylfulvene has been coupled with benzoic acid by treatment with 7-azahydroxybenzotriazole and DCC. Subsequent two-fold deprotonation, at the NH and 6-methyl groups, generated the vinylidene-bridged Cp/benzoylamido ligand 5. Treatment of 5 with ZrCl 4 (THF) 2 gave the spirometallocene complex 3a (characterized by X-ray crystal structure analysis), while reaction of 5 with (Et 2 N) 2 ZrCl 2 (THF) 2 yielded the bridged half-sandwich complex 3b. Treatment of 3a with two molar equivalents of the

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