Base catalysed rearrangements involving ylide intermediates. Part 17. The preparation and thermal rearrangement of pentadienylammonioamidates
作者:Kan Chantrapromma、W. David Ollis、Ratnasamy Somanathan、Ian O. Sutherland
DOI:10.1039/p19830001041
日期:——
The thermal rearrangements of the (2′E)-penta-2′,4′-dienylammonioamidates (13) give products (14) and (15) that are formally derived from [1,2] and [5,2] rearrangements and, in some cases, the product (16) of a [3,2] rearrangement. The products (14) and (15) are formed by a radical mechanism in which (a) radical recombination to give the products (14) and (15) competes with recombination to give the
的(2'的热重排ë) -戊基-2',4'- dienylammonioamidates(13)得到产物(14)和(15),其形式上从[1,2]导出并[5,2]重排和在某些情况下,[3,2]重排的乘积(16)。产物(14)和(15)是通过自由基机理形成的,其中(a)自由基重组以得到产物(14)和(15)与重组竞争以得到氨基酰胺酸盐(13)和(19)和(b)。 )与自由基对重组和扩散形成自由基相比,自由基对(7)和(8)的翻译平衡快。