First synthesis of cis-enediynes from 1,5-diynes by an acid-mediated allylic rearrangement
作者:Wei-Min Dai、Kin Chiu Fong
DOI:10.1016/0040-4039(96)01924-7
日期:1996.11
The first synthesis of cis-enediynes 11 from 1,5-diyne 7 is achieved by treatment with 1 equivalent of CSA in CH2Cl2 at 20 °C in the presence of ROH or RSH to provide 11 as the major products in good yield. An 11-membered ring enediyne 15 was prepared similarly in 47% yield.
Regioselective Synthesis of Acyclic <i>cis</i>-Enediynes via an Acid-Catalyzed Rearrangement of 1,2-Dialkynylallyl Alcohols. Syntheses, Computational Calculations, and Mechanism
作者:Wei-Min Dai、Jinlong Wu、Kin Chiu Fong、Mavis Yuk Ha Lee、Chi Wai Lau
DOI:10.1021/jo982476v
日期:1999.7.1
2-diyn-2-propen-1-ols 1 possessing a C3-aryl group in the presence of water, alcohols, or thiols. Reactivity of allyl alcohols and regio- and cis/trans diastereoselectivity of the allylic migration were examined. In the presence of (±)-10-camphorsulfonic acid (CSA), the parent allyl alcohol 5 and the C3-methyl-substituted 9 failed to give enediynes, whereas the C3-aryl-substituted 12 and 29 underwent the allylic rearrangement