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Small but effective: The title reaction, after microwave-assisted removal of the N,N-dimethylsulfamoyl protecting group, leads to chiral diarylmethyl amines. The use of 1 mol % catalyst and 1.3 equivalents of aryl boronic acid results in excellent yields (up to 98 %) and enantioselectivities (up to 95 % ee) of the isolated products. acac=acetylacetonate; eth=ethylene.
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Jagt et al. (2006) studied this question.
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