Some alkyl allyl carbonates and an allylammonium chloride bearing (1-(butyloxy)ethyl)oxy group at the 2-position of the allyl group were synthesized and successfully transformed to oxodimethylenemethane-palladium and -platinum complexes in one step by mixing with a transition metal-(0) and triphenylphosphine. On the basis of the confirmation of vinyl ether formation by H-1 NMR, the generation of oxodimethylenemethane complexes was rationalized to occur through abstraction of the beta-hydrogen on the acetal carbon by an alkoxide ion which was generated from the allyl carbonate upon oxidative addition of the transition metal. The palladium-catalyzed cycloaddition of the acetonylidene group to strained olefins also proceeded successfully by using these alkyl allyl carbonates.
New type of 1,3-molecular rearrangement of substituted-vinyl alkoxymethyl ethers and its application to synthesis of 1(or 3)-substituted 4-alkoxybutan-2-ones
作者:Xueping Gu、Isao Ikeda、Mitsuo Okahara
DOI:10.1021/jo00247a015
日期:1988.6
GU, XUE-PING;IKEDA, ISAO;OKAHARA, MITSUO, J. ORG. CHEM., 53,(1988) N 12, 2737-2740