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A novel chiral (salen)AlIII complex was synthesized through the reaction of Et2AlCl and salen (R,R)‐1 derived from (R,R)‐11,12‐diamino‐9,10‐dihydro‐9,10‐ethanoanthracene. This complex is an efficient catalyst for the asymmetric trimethylsilylcyanation of aldehydes in the presence of tributylphosphane oxide as an additive. The use of 1 mol‐% of the complex led to the corresponding cyanohydrins in high yields (85–94 %) with good‐to‐excellent enantioselectivities (42–92 % ee).(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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Zeng et al. (2008) studied this question.
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