Lewis Acid Promoted, O-Selective, Nucleophilic Addition of Silyl Enol Ethers to NdO bonds We thank Prof. Akira Yanagisawa (Department of Chemistry, Faculty of Science, Chiba University) for helpful discussion, Dr. Yujiro Hoshino for stimulating discussion and X-ray crystallographic analysis, and Mr. Kin-ichi Oyama (Chemical Instrument Center of Nagoya University) for measurement of ESI mass spectra.