Abstract
AbstractReactions of the in situ prepared 1‐methylindol‐2‐yl nitrile oxide (2a) with dipolarophiles lead to isoxazolines 5 and isoxazoles 8 and to their chloro‐derivatives 6 and 9 in good yields. Analogous reactions of the 1,3‐dimethylindol‐2‐yl nitrile oxide (2b) give the isoxazolines 10 and the isoxazoles 12 as main products as well as their oxidation products 11 and 13 in low yields. The mechanism of the reactions and the spectral elucidation of the cycloadducts are discussed.
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