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- In a single related example emplying N,N-dibenzylamino aldehyde, cerium reagent did not improve the efficiency of the addition reaction. See, ref. 3b.
- The diastereomers ratio was determined by 1H NMR analysis of the crude product. The vinylic signal of the syn (1′S) isomers appers at a higher field than that of anti (1′R) isomer.