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The enolization was accomplished by treatment with TESCl and DBU at ambient temperature. See the Supporting Information for further details
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The enolization was accomplished by treatment with TESCl and DBU at ambient temperature. See the Supporting Information for further details.
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The Z- to E-ratios of amines 21 and 24 were slightly higher than the Z- to E-ratios of azide-containing silyl enol ethers 14 and 22. This suggests that the rate of cyclization of the Z-silyl enol ether is slightly slower than the cyclization rate of E-silyl enol ether.
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Analogous oxygen-centered radical cyclizations onto silyl enol ethers (ref 5b) were consistent with the Beckwith-Houk model for diastereo-selectivity.
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Analogous oxygen-centered radical cyclizations onto silyl enol ethers (ref 5b) were consistent with the Beckwith-Houk model for diastereo-selectivity.
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Benzene is a listed carcinogen within the EEC. Appropriate ventilation and safety precautions should be taken when working with this solvent
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Benzene is a listed carcinogen within the EEC. Appropriate ventilation and safety precautions should be taken when working with this solvent.
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