Polyamine derivatives of oxidized olefinic substituted dicarboxylic acid
申请人:Standard Oil Company (Indiana)
公开号:US04203730A1
公开(公告)日:1980-05-20
A polyamine derivative of an oxidized substantially undegraded olefinic substituted dicarboxylic acid compound and gasoline compositions containing an effective amount of the reaction product.
Catalytic Carbonylation of β-Lactones to Succinic Anhydrides
作者:Yutan D. Y. L. Getzler、Vinod Kundnani、Emil B. Lobkovsky、Geoffrey W. Coates
DOI:10.1021/ja048946m
日期:2004.6.1
A well-defined, highly active and selective catalyst for the synthesis of succinic anhydrides from CO and beta-lactones is reported. At 200 psi of CO, the catalyst [(N,N'-bis(3,5-di-tert-butylsalicylidene)phenylenediamino)Al(THF)2][Co(CO)4] carbonylates beta-propiolactones to succinic anhydrides in high yield. (R)-beta-Butyrolactone is carbonylated to (S)-methylsuccinic anhydride with clean inversion of stereochemistry, while cis-2,3-dimethyl-beta-propiolactone yields exclusively trans-2,3-dimethylsuccinic anhydride. These data are consistent with a mechanism involving nucleophilic attack by [Co(CO)4]- on the beta carbon of the lactone, followed by CO insertion and anhydride formation.