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Hydrogen‐Bonding Network Promoted [3+2] Cycloaddition: Asymmetric Catalytic Construction of Spiro‐pseudoindoxyl Derivatives 下载免费PDF全文
The enantioselective construction of a spirocyclic quaternary stereogenic carbon center at the C2 position of indole has long been an elusive problem in organic synthesis. Herein, by employing a rationally designed hydrogen‐bonding network activation strategy, for the first time, 2,2′‐pyrrolidinyl‐spirooxindole, which is a valuable and prevalent indole alkaloid scaffold, was directly obtained through a catalytic asymmetric [3+2] cycloaddition reaction with high yields and excellent stereoselectivities. 相似文献
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