Development and Application of a New General Method for the Asymmetric Synthesis of (E)-(2-En-3-ynyl)-amines
作者:Chao Yin、Xin-Ping Hui、Peng-Fei Xu、Liang-Feng Niu、Yong-Fei Chen、Binghe Wang
DOI:10.1002/adsc.200800642
日期:2009.2
Abstractmagnified imageThe first direct approach for the asymmetric synthesis of (E)‐2‐arylidene‐1,4‐diphenylbut‐3‐yn‐1‐amines by addition of alkynylzinc to chiral N‐tert‐butylsulfinylimines is reported with excellent diastereoselectivity and good yield. This asymmetric addition reaction provides a practical, economical and concise synthesis of multifunctional molecules with the 1,3‐enyne side chain and an amino group. In addition, this methodology can be applied to the synthesis of substituted vinyl iodide compounds, and substituted chiral dihydropyrroles.
Highly Diastereoselective Addition of Alkynylmagnesium Chlorides to <i>N</i>-<i>tert</i>-Butanesulfinyl Aldimines: A Practical and General Access to Chiral α-Branched Amines
作者:Bai-Ling Chen、Bing Wang、Guo-Qiang Lin
DOI:10.1021/jo902424m
日期:2010.2.5
N-tert-butanesulfinyl imines proceeded with a remarkably high diastereoselectivity (dr > 13:1, mostly diastereopure), and with a general scope of both reaction partners. The high dr translated into simplified purification and higher optical purity for the synthesis of a wide array of chiral α-branched amines. The alkyne functionality also provides a multitude of opportunities for further synthetic transformations