Bulletin of the Academy of Sciences of the USSR Division of Chemical Science p. 2513 - 2517 (1989)
Update date:2022-08-06
Topics:
Tomilov, Yu. V.
Kostitsyn, A. B.
Shulishov, E. V.
Khusid, A. Kh.
Nefedov, O. M.
Cyclopropanation of 1-butadienyl ethers or esters with diazomethane proceeds selectively in the presence of (PhCN)2PdCl2, as opposed to CuCl, at the less polar terminal double bond in these dienes when the molar proportions of reactants and catalysts are 1:(1.3-2):(0.002-0.005) to give the 2-cyclopropylvinyl ethers or esters in yields of 80-85percent.
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