作者:Merritt B Andrus、Kris G Mendenhall、Erik L Meredith、B.B.V Soma Sekhar
DOI:10.1016/s0040-4039(02)00152-1
日期:2002.3
The boron enolate of 5S,6S-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.
5 S,6 S-双-5,6-(4-甲氧基苯基)-2-二恶烷酮的烯醇硼与各种醛反应生成高收率,高选择性的抗乙醇酸羟醛缩醛产物。结果与E-烯酸酯通过封闭的过渡态反应一致。保护加合物,并用硝酸铈铵方便地除去助剂,得到有用的中间体。