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Unformatted text preview: possible chair forms: OTs H CH 3 H OTs H H CH 3 OTs H H H 3 C H H H H OTs H H 3 C H H H H H 2 1 Only the hydrogens labelled with the arrows are in position to do a perfect, 180 anti elimination, and so the compound assigned as 1 gives only the single product shown, whereas 2 gives two products. OTs H CH 3 H OTs H H CH 3 H H H H CH 3 CH 3 CH 3 + loss of H b loss of H a b a 1 2...
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- Fall '10