Enantioselective Synthesis of Bicyclo[6.1.0]nonane-9-carboxylic Acids via Me<sub>2</sub>AlOTf-Promoted Intramolecular Friedel−Crafts Alkylation of Arenes with the γ-Lactone Moiety of 3-Oxabicyclo[3.1.0]hexan-2-ones
作者:Eric Fillion、Rachel L. Beingessner
DOI:10.1021/jo0351419
日期:2003.11.1
acids via Me2AlOTf-promoted intramolecular Friedel-Crafts alkylation of tethered pi-nucleophiles with the gamma-lactone moiety of 3-oxabicyclo[3.1.0]hexan-2-ones is described. The approach begins with the enantioselective synthesis of 3-oxabicyclo[3.1.0]hexan-2-ones bearing a tethered pi-nucleophile at the 6-position by intramolecular Rh(II)-catalyzed cyclopropanation of allylic diazoacetates, prepared
一种通过Me2AlOTf促进的分子内Fried-Crafts烷基化的π-亲核基团与3-氧杂双环[3.1.0] hexan-描述了2个位。该方法首先通过分子内Rh(II)催化的烯丙基重氮乙酸酯的环丙烷化对映体选择性合成在6位带有拴系π-亲核试剂的3-氧杂双环[3.1.0]己-2-酮。 Z)-烯丙醇。Me2AlOTf诱导的分子内Friedel-Crafts环化反应可高产率提供中等大小的碳环和杂环,而无需高稀释度或缓慢的底物添加技术。提出了这种综合方法的范围和局限性。