Designing armory: The side-arm-modified In-TOX/NiII complex was identified as a highly efficient and stereoselective catalyst for the [3+3] cycloaddition of aromatic azomethine imines with cyclopropanes (see picture). Density functional calculations and control experiments revealed that the directing effect of the side arm through π interactions is crucial to the stereochemical control.
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Zhou et al. (2012) studied this question.