Golden touch: N-allenylsulfonamides react with styrene derivatives to furnish chiral cyclobutanes in both high yield and enantioselectivity at −70 °C. Phosphoramidite ligands such as 1, facilitate this asymmetric gold(I)-catalyzed [2+2] cycloaddition. Tf=trifluoromethanesulfonyl.
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Suárez‐Pantiga et al. (2012) studied this question.
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