作者:Grzegorz Mlostoń、John Warkentin、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.200790210
日期:2007.10
The reactions of dimethoxycarbene (DMC; 2), which was generated in situ by thermal decomposition of 2,5-dihydro-2,2-dimethoxy-5,5-dimethyl-1,3,4-oxadiazole (1), with N-tosylated imines of xanthone and 2,3 : 6,7-dibenzosuberenone, 3a and 3d, respectively, led to different adducts with rearranged skeletons. In the case of 3a, the 1 : 1 adduct 5 as well as the 2 : 1 adduct 6 were obtained (Scheme 2).
二甲氧基卡宾(DMC; 2)与N在热分解2,5-二氢-2,2-二甲氧基-5,5-二甲基-1,3,4-恶二唑(1)时生成的反应黄酮和2,3:6,7-二苯并肾上腺素,3a和3d的甲苯磺酰化亚胺导致骨架重排的不同加合物。在3a的情况下,获得了1:1加合物5和2:1加合物6(方案2)。两种产物的形成都可以通过两性离子中间体中DMC片段的MeO基团的迁移来解释。另一方面,为了形成2和3d的两个1∶1加合物13和14,必须迁移DMC的Me基团(方案5)。所有产品的结构均已通过X射线晶体学确定。