Functionalized esters as bis-electrophiles in a silicon-induced domino synthesis of annulated carbocycles
作者:Florian Genrich、Guido Harms、Ernst Schaumann、Mimoza Gjikaj、Gunadi Adiwidjaja
DOI:10.1016/j.tet.2009.01.119
日期:2009.7
The reaction of silyl-substituted carbanion 1b with arene-1,2-dicarboxylates 6, 15 yields indenone derivatives 11, 16 in a domino process involving silyl C→O migration and elimination. However, in a competing pathway, the initial addition of 1b leads to lactone formation (8, 17). Substrates 26, 38 containing an ester group and a bromine substituent react with 1b under substitution of the halogen not
甲硅烷基取代的碳负离子反应1B与芳烃- 1,2-二羧酸酯6,15个产量茚酮衍生物11,16在涉及甲硅烷→O;迁移和消除℃的多米诺过程。然而,在竞争途径中,初始加入1B导致内酯的形成(8,17)。基底26,38含酯基团和取代基溴与反应1b的下不允许甲硅烷迁移卤素取代。但是用TBAF进行的去甲硅烷基化反应会产生反应性碳负离子,从而提供苯并环化的环烷酮29,40。