Palladium-Catalyzed Sequential Vinyl C–H Activation/Dual Decarboxylation: Regioselective Synthesis of Phenanthrenes and Cyclohepta[1,2,3-de]naphthalenes
作者:Guomin Jiang、Hao Ye、Lei Shi、Hong Dai、Xin-Xing Wu
DOI:10.1021/acs.orglett.1c03517
日期:2021.12.17
The application of a C(vinyl), C(aryl)-palladacycle from vinyl-containing substrates is challenging due to the interference of a reactive double bond in palladium catalysis. This Letter describes a [4 + 2] or [4 + 3] cyclization based on a C(vinyl), C(aryl)-palladacycle by employing α-oxocarboxylic acids as the insertion units under a palladium/air system. The reaction proceeded through the key vinyl
由于钯催化中反应性双键的干扰,从含乙烯基底物中应用 C(乙烯基)、C(芳基)-钯环具有挑战性。这封信描述了基于 C(乙烯基)、C(芳基)-钯环的 [4 + 2] 或 [4 + 3] 环化反应,在钯/空气系统下使用 α-氧代羧酸作为插入单元。该反应通过关键的乙烯基 C-H 活化和双脱羧序列进行,以良好的产率区域选择性地形成菲和环庚 [1,2,3-de] 萘。克级合成和合成功能材料分子突出了该协议的合成多功能性。