Dispiroketals in synthesis (Part 16): Functionalised dispiroketals as new chiral auxiliaries; the synthesis of dihydroxylated dispiroketals in optically pure form and their application as bifunctional, C2-symmetrical, chiral auxiliaries for highly stereos
作者:Barend C. B. Bezuidenhoudt、Grant H. Castle、Jean E. Innes、Steven V. Ley
DOI:10.1002/recl.19951140410
日期:——
A range of rigid, architecturally complex diols derived from dispiroketals have been synthesised. A bifunctional, C2-symmetrical, chiral auxiliary derived from these dihydroxylated dispiroketals has been used to induce a high degree of asymmetry in Michael additions of cuprates to a variety of di-α, β-unsaturated ester systems.
已经合成了多种衍生自二螺酮的刚性,结构复杂的二醇。衍生自这些二羟基化的二螺酮化合物的双功能,C 2对称的手性助剂已被用来在各种二-α,β-不饱和酯体系的迈克尔加成反应中诱导高度不对称。