108572-90-3Relevant academic research and scientific papers
SYNTHESIS AND REARRANGEMENT OF FUNCTIONALIZED DISPIROUNDECANES - PREFERRED C4-C5 OVER C3-C4 RING ENLARGEMENTS
Fitjer, Lutz,Majewski, Marita,Kanschik, Andreas,Egert, Ernst,Sheldrick, George M.
, p. 3603 - 3606 (1986)
The functionalized dispiroundecanes 9 and 8 undergo cascade rearrangements to yield the bi- and tricyclic systems 10, 11, 12 and 3, respectively.The rearrangements proceed via an initial enlargement of the four-membered ring.
Synthesis and rearrangement of dispiro[2.0.3.4]-, dispiro-[3.0.3.3]- and dispiro[2.1.3.3]undecanes-preferred C4-C5 over C3-C4 and C4-C3 over C5-C6 rearrangements
Fitjer,Rissom,Kanschik,Egert
, p. 10879 - 10892 (2007/10/02)
The dispiranes 10-12 have been synthesized and rearranged by treatment with acids. With 10, an initial C3-C4 ring enlargement leads to [3.3.3]propellane 21, with 11, an initial C4-C3 ring contraction leads to pe
