Simple and Efficient Syntheses of N-Glyoxyloyl-7,7-dimethylnorbornane-(1S,2R)-oxazolidinone and Its Thio Derivative - Useful Chirons for Diastereoselective Reactions

The compound names for structures 2a, 2b, 3, 5 and 6 were misprinted. The correct names are as follows:N-Crotonoyl-7′,7′-dimethylnorbornane-(1′S,2′R)-oxazolidinone (2a)N-Crotonoyl-7′,7′-dimethylnorbornane-(1′S,2′R)-oxazolidinethione (2b)N-Glyoxyloyl-7′,7′-dimethylnorbornane-(1′S,2′R)-oxazolidinone (3)N-Glyoxyloyl-7′,7′-dimethylnorbornane-(1′S,2′R)-oxazolidinethione Ethyl Acetal (5) N-Glyoxyloyl-7′,7′-dimethylnorbornane-(1′S,2′R)-oxazolidinethione Ethyl Hemiacetal (6)In the analytical data for these compounds, [α] _d ²⁰ values were misprinted as [a] _d ²⁰ values, and NMR data were reported as d values instead of the correct δ values. The editorial office apologizes for these typographical errors.