Discrete bridging and terminal copper carbenes in copper-catalyzed cyclopropanation
X Dai, TH Warren
Index: Dai, Xuliang; Warren, Timothy H. Journal of the American Chemical Society, 2004 , vol. 126, # 32 p. 10085 - 10094
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Citation Number: 124
Abstract
The Cu (I) β-diketiminate [Me2NN] Cu (η2-ethylene)(2) catalyzes the cyclopropanation of styrene with N2CPh2 to give 1, 1, 2-triphenylcyclopropane in 67% yield. Addition of N2CPh2 to 2 equiv of 2 allows for the isolation of the dicopper carbene {[Me2NN] Cu} 2 (μ-CPh2)(3) in which the diphenylcarbene moiety is symmetrically bound between two [Me2NN] Cu fragments (Cu-C= 1.922 (4) and 1.930 (4) Å) with a Cu-Cu separation of 2.4635 (7) Å. In ...
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