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• W2950650275 abstract "Several uncatalyzed and transition metal-catalyzed cross coupling reactions of the Grignard compounds 1c or 2c with propargylic or allylic halides were investigated. Fe(acac)3 was the most effective catalyst for the preparation of allyl-and propargylbicyclo[1.1.0]butanes 7 and 5. In the latter case, the formation of the isomeric allenylbicyclo[1.1.0]butanes 6 was also observed. Stereoelectronic factors of substituents like a trimethylsilyl group as a directing group could be utilized for the formation of either 5 or 6. A number of bicyclo[1.0.0]butanes 15–21 with two substituents in the bridgehead positions were accessible by that route as well. In the case of the bis-allenyl compound 24c, an ene-type reaction leading to the first known derivative of a [4.1.1]propella-2,4-diene 25 was observed. Base-catalyzed isomerizations of the propargylbicyclo[1.1.0]butanes 5 opened a new route to alkynylbicyclo[1.1.0]butanes 30–32." @default.
• W2950650275 created "2019-06-27" @default.
• W2950650275 creator A5021448436 @default.
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• W2950650275 date "1994-06-01" @default.
• W2950650275 modified "2023-10-07" @default.
• W2950650275 title "Iron‐Catalyzed Coupling of Tricyclo[4.1.0.0 ^2,7 ]hept‐1‐ylmagnesium Bromide and Related Grignard Reagents with Propargylic and Allylic Halides" @default.
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• W2950650275 doi "https://doi.org/10.1002/cber.19941270617" @default.
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