Starting from an appropriate unsaturated phenylglycinol-derived oxazolopiperidone lactam, the synthesis of (-)-16-episilicine is reported, the key steps being a stereoselective conjugate addition, a stereoselective alkylation, and a ring-closing metathesis reaction. This represents the first enantioselective total synthesis of an alkaloid of the silicine group.
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Amat et al. (2009) studied this question.
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