First asymmetric desymmetrisation of a centrosymmetric molecule: CBS reduction of a 2-pyridone [4 + 4]-photodimer derivative

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Alan C. Spivey, Benjamin I. Andrews, Alan D. Brown and Christopher S. Frampton


Abstract

The B-Me-(S)-CBS catalysed borane reduction of centrosymmetric bis-N-Boc tetrahydro photodimer 3 has been achieved with virtually complete enantiotopic group selectivity (>97% ee) and in good yield (76%).


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