Antibiotics U 1200Synthesis of Dihydropyran Subunit of (+)-Sorangicin A Using RCM Reaction. -Title compound (V) is synthesized starting from chiral oxazolidinone (I) via Evans aldol reaction [→ (III)] and ring-closing metathesis of alcohol (IV) as key steps. -(PARK, S. H.; LEE*, H. W.; Bull. Korean Chem.
Diastereoselective syntheses O 0031 Metal-Mediated Diastereoselective Allylation Reaction of Chiral α,β-Epoxy Aldehyde. Part 2. -A general method for the metal-mediated diastereoselective allylation of chiral epoxy aldehydes affords homoallylic alcohols in moderate diastereomeric excess and in excellent yields and purity. Compared to other metals used, zinc offers the advantages of low toxicity and high reactivity. -(PARK, S. H.; YOON, H. K.; LEE*, H. W.; Bull. Korean Chem.
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Antibiotics U 1200Synthetic Studies on Tedanolide: Stereoselective Synthesis of the C13-C21 Fragment. -The concise and stereoselective synthesis of the title fragment (VIII) involves the metal-mediated allylation of (I) and the Roush asymmetric crotylation of (V) as the key steps. -(PARK, S. H.; MIN, J. K.; PARK, S. H.; LEE*, H. W.; Bull. Korean Chem.
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