Copper-Catalyzed γ-Selective and Stereospecific Direct Allylic Alkylation of Terminal Alkynes: Synthesis of Skipped Enynes
作者:Yusuke Makida、Yurie Takayama、Hirohisa Ohmiya、Masaya Sawamura
DOI:10.1002/anie.201300785
日期:2013.5.10
Skipping out: The title reaction using internal secondary allylic phosphates proceeded with excellent γ regioselectivity and E stereoselectivity to give skipped enynes. Enantioenriched secondary allylic phosphates proceeded with 1,3‐anti stereochemistry to afford the corresponding chiral 1,4‐enynes, which were used for various derivatizations and the formal total synthesis of a GnRH antagonist. phen=1
跳过:使用内部仲烯丙基磷酸酯的标题反应以优异的γ区域选择性和E 立体选择性进行,得到跳过的烯炔。富含对映体的仲烯丙基磷酸酯经过1,3-抗立体化学反应,得到相应的手性1,4-烯炔,可用于各种衍生化反应和GnRH拮抗剂的正式全合成。phen = 1,10-菲咯啉。