Efficient Synthesis of Phenanthridinone Derivatives via a Palladium-Catalyzed Coupling Process
摘要:
A palladium-mediated domino reaction was developed to conveniently synthesize phenanthridinone derivatives. Phosphine ligand 1 strongly promotes the domino process, which includes aryl-aryl coupling and C-N bond formations concomitant with a deamidation reaction. The versatility and applicability to a broad range of substrates make this reaction useful for the development of bioactive derivatives.
已经开发了一种一锅法 Cu( I ) 辅助合成方法,用于通过使用碲双阴离子从 2-溴-N-芳基苯甲酰胺、苯甲醇和苯甲酸制备具有生物学重要意义的C 2 -对称螺二氮杂、苯甲氧基和苯甲氧基碲烷。 (Te 2- ) 在无碱条件下。此外,在相同的反应条件下,通过使用过量的 Na 2 Te 制备了 C-C 偶联联芳基 1,1'-二酰胺。合成的螺二氮杂碲烷可作为还原 H 2 O 2和硝基-迈克尔反应的有效催化剂。
Copper-catalyzed tandem aryl–halogen hydroxylation and CH<sub>2</sub>Cl<sub>2</sub>-based N,O-acetalization toward the synthesis of 2,3-dihydrobenzoxazinones
作者:Xuwen Chen、Wenyan Hao、Yunyun Liu
DOI:10.1039/c7ob00625j
日期:——
The concise synthesis of 2,3-dihydro-4H-benzo[e][1,3]oxazin-4-ones has been accomplished by copper-catalyzedtandemreactions of o-halobenzamides, LiOH and dichloromethane. The aryl–halogen bond hydroxylation and subsequent N,O-acetalization on CH2Cl2 are enabled under catalytic conditions which allows the generation of C(sp2)–O, C(sp3)–O and C(sp3)–N bonds to give the target products.
A useful acylation method using trichloroacetonitrile and triphenylphosphine for solid phase organic synthesis
作者:István Vágó、István Greiner
DOI:10.1016/s0040-4039(02)01241-8
日期:2002.8
A novel acylation procedure was developed for polymer supported synthesis, with in situ generated acyl chlorides usingtrichloroacetonitrile and triphenylphosphine.
开发了一种新的酰化方法,用于聚合物支持的合成,使用三氯乙腈和三苯基膦原位生成的酰氯。
Palladium-Catalyzed Annulation of Arynes by <i>o</i>-Halobenzamides: Synthesis of Phenanthridinones
作者:Chun Lu、Anton V. Dubrovskiy、Richard C. Larock
DOI:10.1021/jo3016192
日期:2012.10.5
The palladium-catalyzedannulation of arynes by substituted o-halobenzamides produces N-substituted phenanthridinones in good yields. This methodology provides this important heterocyclic ring system in a single step by simultaneous C–C and C–N bond formation, under relatively mild reaction conditions, and tolerates a variety of functional groups.
Microwave-promoted efficient synthesis of a (Z)-3-methyleneisoindolin-1-one library from 2-bromobenzamides and terminal alkynes using Cu(OAc)2•H2O/DBU is described. Various benzamide substituents, ring substitutions, including heteroaryl, aryl acetylenes and aliphatic alkynes, could be applied to afford the desired products in good to moderate yield with high stereoselectivity. It is noteworthy that DBU maybe play a dual role as not only the base, but also as a ligand for copper. The reaction is catalyzed by the complex of Cu(OAc)2•H2O and DBU without other additives.
A novel synthetic pathway to approach 3-(imino)isoindolin-1-ones by the Co-catalyzed cyclization reaction of 2-bromobenzamides with carbodiimides has been developed. This catalytic reaction can tolerate a variety of substituents and provide corresponding products in moderate yields for most cases. According to the literature, the reaction mechanism is proposed through the formation of a five-membered