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1. SYNTHESIS AND STEREOCHEMISTRY OF SOME NEW 1,3-OXATHIANES OBTAINED FROM 1,4-DIMERCAPTOTHREITOL. 2. SYNTHESIS AND STEREOCHEMISTRY OF SOME NEW 1,3-DIOXANE DERIVATIVES OF α, β-UNSATURATED ALDEHYDES. 3. SYNTHESIS AND STEREOCHEMISTRY OF SOME NEW 2,4-SUBSTITUTED-1,3-DIOXANES. 4. SYNTHESIS AND STEREOCHEMISTRY OF SOME NEW 2,5-POLYSUBSTITUTED –1,3-DIOXANES. 5. STEREOCHEMISTRY AND NMR SPECTRA OF SOME NEW 5-METHYL-2,2-SUBSTITUTED-1,3-DIOXANES. 6. SYNTHESIS AND STEREOCHEMISTRY OF SOME SPIRO-1,3-OXATHIANE DERIVATIVES. |
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