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2, which was found to be efficient as catalyst in the direct addition of malonates to N-Boc imines.
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2, which was found to be efficient as catalyst in the direct addition of malonates to N-Boc imines.
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Previous optimizations revealed that aromatic solvents were the most efficient
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Previous optimizations revealed that aromatic solvents were the most efficient.
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0037032312
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For an efficient preparation of N-Boc imines, see: Wenzel, A. G.; Jacobsen, E. N. J. Am. Chem. Soc. 2002, 124, 12964 and ref 6a.
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For an efficient preparation of N-Boc imines, see: Wenzel, A. G.; Jacobsen, E. N. J. Am. Chem. Soc. 2002, 124, 12964 and ref 6a.
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Boc was found to be the most efficient N-protecting group under conditions described in Table 2, entry 11. The N-Cbz analogue of 1a furnished the corresponding product in 54% ee.
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Boc was found to be the most efficient N-protecting group under conditions described in Table 2, entry 11. The N-Cbz analogue of 1a furnished the corresponding product in 54% ee.
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