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ORGANIC LETTERS 2010 Vol. 12, No. 5 1144
Additions and Corrections Volume 10, 2008
Jeremy P. Olson and Huw M. L. Davies* Asymmetric [4 + 3] Cycloadditions between Benzofuranyldiazoacetates and Dienes: Formal Synthesis of (+)-Frondosin B. Page 574. The initial products isolated in the [4 + 3] cycloaddition between benzofuranyldiazoacetates and dienes are the nonrearomatized products 9-15 rather than the rearomatized benzofuran products 9′-15′ shown in the original Table 1. The nonrearomatized products 9-15 require treatment with conc HCl for 16 h to induce isomerization to 9′-15′. Table 1 in the original manuscript should be replaced by Table 1 shown below. A corrected experimental section is included in the Supporting Information.
Table 1. Rh2(R-DOSP)4-Catalyzed Reactions of 8 with Dienes
a
Isolated yield of 9′-15′ for the two-step sequence.
OL100111W 10.1021/ol100111w Published on Web 02/01/2010
