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New nucleophiles for the O-nitroso aldol reaction in the form of readily prepared disilanyl enol ethers make this transformation more practical and more versatile. A silver catalyst with a chiral biaryl phosphite ligand promotes the title reaction with high enantio- and regioselectivity (see scheme). R1,R2 = H, Ar; TMS = trimethylsilyl.
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Kawasaki et al. (2008) studied this question.
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