2-取代的吲哚和苯并呋喃的合成是通过亲核芳族取代,随后在亲核体和邻乙炔之间进行5-endo-dig环化来实现的。乙炔起着吸电子基团的双重作用,以激活S N Ar的底物,而C1-C2碳骨架则用于新形成的5元杂芳族环。这种方法可以使Ar–X–N / O–C1的键形成顺序在一个合成步骤中进行,从而以中等至高收率提供吲哚和苯并呋喃。由于该方法不是过渡金属介导的,因此可以耐受溴化和氯化的底物,可以使用水或水-DMSO混合物作为溶剂进行苯并呋喃的形成。
Lewis acid-mediated cross-coupling reaction of 7-azaindoles and aldehydes: Cytotoxic evaluation of C3-linked bis-7-azaindoles
作者:Suk Hun Lee、Kunyoung Kim、Yeong Uk Jeon、Amit Kundu、Prasanta Dey、Jong Yeon Hwang、Neeraj Kumar Mishra、Hyung Sik Kim、In Su Kim
DOI:10.1016/j.tetlet.2019.150974
日期:2019.8
3′-bis-7-indolylmethane derivatives is important for their further development as pharmaceutical compounds and other synthetic purposes. Herein, we describe the zinc- or acid-mediated cross-coupling reaction of 7-azaindoles with aldehydes, such as paraformaldehyde, alkyl aldehydes, aryl aldehydes, enal, and α-ketoaldehyde, providing the corresponding C3-linked bis-7-azaindole derivatives, which are a crucial class
Microwave-assisted palladium mediated decarbonylation reaction: synthesis of eulatachromene
作者:Akanksha、Debabrata Maiti
DOI:10.1039/c2gc35622h
日期:——
Microwave-assisted decarbonylation reactions were investigated using a palladium catalyst. A large number of aldehydes can be decarbonylated efficiently with lower catalyst loadings and under shorter reaction times compared to conventional heating. A successful decarbonylation led to the synthesis of natural product eulatachromene in three steps starting from easily available materials.
Diazo compounds play an important role as a coupling partner in the synthesis of unique π-conjugated 7-azaindole derivatives via rhodium(III)-catalyzed double C–H activation/cyclization.
A facile decarbonylation reaction of aldehydes has been developed by employing Pd(OAc)2. A wide variety of substrates are decarbonylated, without using any exogenous ligand for palladium as well as CO-scavenger.