Glycolate aldol reactions with boron enolates of bis-4-methoxyphenyl dioxanone
2002
Abstract The boron enolate of 5 S ,6 S -bis-5,6-(4-methoxyphenyl)-2-dioxanone reacted with various aldehydes to produce anti glycolate aldol products in high yield with good selectivity. The outcome is consistent with an E -enolate reacting through a closed transition state. The adducts were protected and the auxiliary was conveniently removed with ceric ammonium nitrate to give useful intermediates.
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