手性饱和氧杂环是生物活性化合物的重要组成部分。醇在侧链烯烃上的环化是其合成的直接途径,但很少有催化对映选择性方法能够环化到未活化的烯烃上。本文报道了一种高效的铜催化 γ-不饱和戊烯醇环化反应,其终止于形成C C 键,这是一种净烯烃碳醚化。证明了分子内和分子间 C C 键的形成,从而产生功能化的手性四氢呋喃以及稠环和桥环氧杂双环产物。过渡态计算支持顺式氧化铜立体化学测定步骤。
Development of Enantioselective Palladium‐Catalyzed Alkene Carboalkoxylation Reactions for the Synthesis of Tetrahydrofurans
作者:Brett A. Hopkins、Zachary J. Garlets、John P. Wolfe
DOI:10.1002/anie.201506884
日期:2015.11.2
The Pd‐catalyzed coupling of γ‐hydroxyalkenes with aryl bromides affords enantiomerically enriched 2‐(arylmethyl)tetrahydrofuran derivatives in good yield and up to 96:4 e.r. This transformation was achieved through the development of a new TADDOL/2‐arylcyclohexanol‐derived chiral phosphite ligand. The transformations are effective with an array of different aryl bromides, and can be used for the preparation
Enantioselective Copper‐Catalyzed Carboetherification of Unactivated Alkenes
作者:Michael T. Bovino、Timothy W. Liwosz、Nicole E. Kendel、Yan Miller、Nina Tyminska、Eva Zurek、Sherry R. Chemler
DOI:10.1002/anie.201402462
日期:2014.6.16
Chiral saturated oxygen heterocycles are important components of bioactive compounds. Cyclization of alcohols onto pendant alkenes is a direct route to their synthesis, but few catalytic enantioselective methods enabling cyclization onto unactivated alkenes exist. Herein reported is a highly efficient copper‐catalyzed cyclization of γ‐unsaturated pentenols which terminates in CC bond formation, a
手性饱和氧杂环是生物活性化合物的重要组成部分。醇在侧链烯烃上的环化是其合成的直接途径,但很少有催化对映选择性方法能够环化到未活化的烯烃上。本文报道了一种高效的铜催化 γ-不饱和戊烯醇环化反应,其终止于形成C C 键,这是一种净烯烃碳醚化。证明了分子内和分子间 C C 键的形成,从而产生功能化的手性四氢呋喃以及稠环和桥环氧杂双环产物。过渡态计算支持顺式氧化铜立体化学测定步骤。