A Highly Stereoselective Addition of Lithiated Ynamides to Ellman–Davis Chiral N‑tert-Butanesulfinyl Imines
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A highly diastereoselective addition of lithiated ynamides to Ellman–Davis chiral imines is described. While additions of N-sulfonyl ynamides are highly stereoselective even without Lewis acids, the use of BF3–OEt2 completely reversed the stereoselectivity. In addition, oxazolidinone-substituted ynamides behaved differently and functioned better with BF3–OEt2, and the chirality of the oxazolidinone ring exerts no impact on the selectivity.
创建时间：
2016-02-19
