Stereoselective construction of an anti-β-alkoxy ether by Ireland–Claisen rearrangement for medium-ring ether synthesis
作者:Kenshu Fujiwara、Natsumi Kawamura、Hidetoshi Kawai、Takanori Suzuki
DOI:10.1016/j.tetlet.2009.01.011
日期:2009.3
The asymmetric synthesis of an acyclic anti-β-alkoxy ether was achieved by the Ireland–Claisen rearrangement of Z-3-alkoxy-2-propenyl glycolate ester, prepared from Garner’s aldehyde, a glycolic acid derivative, and ethynyl N,N-diisopropylcarbamate. The resulting acyclic ether was facilely converted to seven- and eight-membered cyclic ethers via processes involving ring-closing olefin metatheses.
无环抗-β-烷氧基醚的不对称合成是通过由Garner醛,乙醇酸衍生物和乙炔基N,N-二异丙基氨基甲酸酯制备的Z -3-烷氧基-2-丙烯基乙醇酸酯的爱尔兰-克莱森重排实现的。通过涉及闭环烯烃复分解的方法,将所得的无环醚容易地转化为七元和八元环醚。