Stereoselective Synthesis of 3-Alkyl-2-aryltetrahydrofuran-4-ols: Total Synthesis of (?-Paulownin.

[摘要]：A formal [3 + 2]-cycloaddn. involving the Lewis acid mediated reaction of a-silyloxy aldehydes and styrenes to afford 3-alkyl-2-aryltetrahydrofuran-4-ols has been developed. This methodol. was applied to the total synthesis of the naturally occurring furofuran lignan (?-paulownin (I).

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