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A short enantioselective preparation of (1S,2S)-trans-1,2-diamino-3-cyclohexene using a double [3,3]-sigmatropic rearrangement of an allylic bis(imidate) is described (Overman rearrangement). The starting chiral diol is conveniently obtained by enzymatic resolution.
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Demay et al. (2001) studied this question.
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