The mysterious cyclizations of gold: An asymmetric gold(I)-catalyzed formal [3+3] cycloaddition of 2-(1-alkynyl)-2-alken-1-ones with nitrones has been developed. Compound 1 was found to be an effective and reliable chiral catalyst, as well as the commonly used 2, for this gold-catalyzed reaction. Tf=trifluoromethanesulfonyl.
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Liu et al. (2010) studied this question.
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