Carbene−Bridgehead Olefin−Carbene Rearrangement: Formation of the Tetracyclo[4.3.0.0<sup>2,8</sup>.0<sup>4,7</sup>]nonane Skeleton by Carbene CH Insertion<sup>1</sup>
作者:Thomas Ströter、Günter Szeimies
DOI:10.1021/ja984114a
日期:1999.8.1
tetracyclononane derivatives 15 in good yields. The carbenes 6 show only slight preferences in the rearrangement to alkenes 7 and 8. Both could be trapped with α-methylstyrene as ene adducts 16 and 17. The strongly twisted bridgeheadolefin 7 has only the option to rearrange to carbene 9, whereas 8 could give 9 or 10, but prefers to give 9, in accordance with results of DFT calculations. The tetracyclononanes 15c