Chromium(II) chloride-mediated coupling reactions of Garner aldehyde with allyl bromides: facile asymmetric synthesis of (2R,3S )-3-hydroxy-2-hydroxymethylpyrrolidine
作者:Yutaka Aoyagi、Haruko Inaba、Yukiko Hiraiwa、Asako Kuroda、Akihiro Ohta
DOI:10.1039/a805998e
日期:——
Chromium(II) chloride-mediated coupling reactions of 1,1-dimethylethyl (S)- and (R)-4-formyl-2,2-dimethyloxazolidine-3-carboxylates [(S)- and (R)-Garner aldehydes ] (1a,b) with allyl bromides 2a–c proceeded with moderate to good stereoselectivity to give the corresponding homoallyl alcohols 3a–d in good yields. The homoallyl alcohol 3b was easily transformed to (2R,3S)-3-hydroxy-2-hydroxymethylpyrrolidine 8.
氯化铬(II)介导的 1,1-二甲基乙基 (S)- 和 (R)-4- 甲酰基-2,2-二甲基恶唑烷-3-羧酸酯[(S)- 和 (R)-Garner 醛 ](1a,b)与烯丙基溴 2a-c 的偶联反应以中等至良好的立体选择性进行,以良好的产率得到相应的均烯丙基醇 3a-d。均烯丙基醇 3b 很容易转化为 (2R,3S)-3-羟基-2-羟甲基吡咯烷 8。