Organolanthanide-catalyzed cyclodimerizations of disubstituted alkynes

H. J. Heeres, A. Heeres, J. H. Teuben

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The lanthanide alkyls Cp 2 *LnCH(SiMe 3 ) 2 (Ln = La, Ce) are efficient catalysts for the cyclodimerization of 2-alkynes MeC≡CR (R = Me, Et, n-Pr) to 1,2-disubstituted 3-alkylidenecyclobutenes. The first step in the reaction is a propargylic metalation of the α-methyl group, giving Cp* 2 LnCH 2 C≡CR compounds and free CH 2 (SiMe 3 ) 2 . © 1990, American Chemical Society. All rights reserved.
Original languageEnglish
Pages (from-to)1508-1510
JournalOrganometallics
Volume9
Issue number5
DOIs
Publication statusPublished - 1990

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