gamma-Selective Allylation of (E)-Alkenylzinc Iodides Prepared by Reductive Coupling of Arylacetylenes with Alkyl Iodides

The first examples of Cu-catalyzed gamma-selective allylic alkenylation using organozinc reagents are reported. (E)-Alkenylzinc iodides were prepared by Fe-catalyzed reductive coupling of terminal arylalkynes with alkyl iodides. In the presence of a copper catalyst, these reagents reacted with allylic bromides derived from Morita-Baylis-Hillman alcohols to give 1,4-dienes in high yields. The reactions are highly gamma-selective (generally gamma/alpha > 49:1) and tolerate a wide range of functional groups such as ester, cyano, keto, and nitro.


Published in:
Journal Of Organic Chemistry, 81, 13, 5795-5802
Year:
2016
Publisher:
Washington, American Chemical Society
ISSN:
0022-3263
Laboratories:




 Record created 2016-10-18, last modified 2018-03-17

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