An efficient strategy for the total synthesis of (+)-przewalskin B is reported. The key steps feature an intermolecular S(N)2' substitution of iodoallylic phosphate with organocupper reagent, a diastereoselective organocatalytic aldol cyclization, as well as a Rh(2)(OAc)(4)-mediated intramolecular carbene insertion to the tertiary C-H bond.
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| http://dx.doi.org/10.1021/jo201111w | DOI Listing |
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