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- W2950509417 abstract "BF3·OEt2-promoted reactions of 4-N-(benzenesulfonyl)-3-methoxy-1,4-benzoquinone monoimine (5) with (E)-propenylbenzenes bearing strong electron-donating groups on their aromaric rings produce 2-aryl-6-methoxy-3-methyl-5-[N-(benzenesulfonyl)amino]-2,3-diydrobenzofurans (6). With neutral propenylbenzenes, either the dihydrobenzofurans, bicyclo[3.2.1]octenediones 17, or products of tandem cycloaddition (7−9) are formed depending upon reaction conditions. In the latter, molecules with seven to eight asymmetric centers are formed in a single reaction from achiral starting materials. Thus, these seemingly simple reactions yield products of remarkable complexity, and with a high degree of stereoselectivity." @default.
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- W2950509417 date "1998-08-07" @default.
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- W2950509417 title "Lewis Acid-Promoted Reactions of 3-Methoxy-<i>N</i>-(benzenesulfonyl)-1,4-benzoquinone Monoimine with Propenylbenzenes" @default.
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- W2950509417 doi "https://doi.org/10.1021/jo980502j" @default.
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