Iron-Catalyzed Oxidative C–H Functionalization of Internal Olefins for the Synthesis of Tetrasubstituted Furans
作者:Jiang Lou、Quannan Wang、Kaikai Wu、Ping Wu、Zhengkun Yu
DOI:10.1021/acs.orglett.7b01431
日期:2017.6.16
Tetrasubstituted furans were efficiently synthesized from Fe(OAc)2-catalyzed C–H/C–H cross-dehydrogenative-coupling (CDC) reactions of activated carbonyl methylenes with S,S-functionalized internal olefins, that is, α-oxo ketene dithioacetals and analogues, under oxidative conditions. β-Ketoesters, 1,3-dicarbonyls, β-keto nitrile, and amide derivatives were used as the coupling partners. The resultant
四价呋喃是由Fe(OAc)2催化的活化羰基亚甲基与S,S-官能化内烯烃即α-氧代乙烯酮二硫缩醛的C-H / C-H交叉脱氢偶联(CDC)反应有效合成的和类似物,在氧化条件下。β-酮酸酯,1,3-二羰基,β-酮腈和酰胺衍生物用作偶联伙伴。所得的烷硫基和羰基官能化的呋喃可以分别进一步转化为各种芳基化的呋喃衍生物和呋喃稠合的N-杂环。对照实验揭示了自由基反应途径。