Palladium (II)-promoted cyclizations of olefinic silyl enol ethers. Preparations of. sigma.-(1-substituted 3-oxocyclopentyl) methylpalladium (II) complexes and their …

Y Ito, H Aoyama, T Saegusa

Index: Ito,Y.; Aoyama,H.; Saegusa,T. Journal of the American Chemical Society, 1980 , vol. 102, p. 4519

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Citation Number: 54

Abstract

In a preceding paper,'we reported that cyclization of 2-trimethylsilyloxy-1, 5-hexadiene (la) was performed by a catalyst of Pd"(0Ac)~ in acetonitrile to produce 3-methyl-2- cyclopentenone (5). The Pd (I1)-promoted cyclization of la was explained by assuming an intermediate of oxo-a-allylpalladium (I1) complex (2a), which undergoes intramolecular olefin insertion followed by p elimination of palladium hydride from the resultant a-(3- ...

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