Efficient access to 3-substituted-γ-hydroxylactams: the uncatalyzed addition of diorganozinc reagents to cyclic imides with heterocyclic substitution
摘要:
A range of 3-substituted-gamma-hydroxylactams have been prepared via the uncatalyzed addition of organo-zinc nucleophiles to cyclic imides. This reactivity is primarily limited to imides containing heterocyclic N-substitution, but proceeds efficiently with a variety of diorganozinc reagents, including those prepared and utilized without purification, as well as organozinc halides. It is hypothesized that the presence of a Lewis basic directing group is required for optimum reactivity. (C) 2014 Elsevier Ltd. All rights reserved.
Nitrogen-centered radical-mediated C–H imidation of arenes and heteroarenes <i>via</i> visible light induced photocatalysis
作者:Hyejin Kim、Taehoon Kim、Dong Gil Lee、Sang Weon Roh、Chulbom Lee
DOI:10.1039/c4cc03905j
日期:——
The C-H imidation of arenes and heteroarenes has been achieved via visible light induced photocatalysis. In the presence of an iridium(III) photoredox catalyst, the reaction of aromatic substrates with N-chlorophthalimide furnishes the N-aryl products at room temperature through a nitrogen-centered radical mediated aromatic substitution.
Palladium on Carbon: An Efficient, Heterogeneous and Reusable Catalytic System for Carbonylative Synthesis of<i>N</i>-Substituted Phthalimides
作者:Mayur V. Khedkar、Shoeb R. Khan、Dinesh N. Sawant、Dattatraya B. Bagal、Bhalchandra M. Bhanage
DOI:10.1002/adsc.201100460
日期:2011.12
application of palladium on carbon (Pd/C) as a heterogeneous recyclable catalyst was investigated for the double carbonylation of o-dihaloarenes with amines providing excellent yield of N-substituted phthalimides in shorter reaction time as compared to earlier reported homogeneous protocols. Furthermore, the scope of the developed protocol was applied for the synthesis N-substituted phthalimides from o-halobenzoates
Immobilized palladium metal containing ionic liquid catalyzed one step synthesis of isoindole-1,3-diones by carbonylative cyclization reaction
作者:Mayur V. Khedkar、Ajinkya R. Shinde、Takehiko Sasaki、Bhalchandra M. Bhanage
DOI:10.1016/j.molcata.2014.01.018
日期:2014.4
Immobilized palladium metal containing ionicliquid (ImmPd-IL) catalyzed carbonylative cyclization reaction of 2-iodobenzoic acid and primary amine provided N-substituted isoindole-1,3-dione derivatives in good to excellent yield. The influence of various reaction parameters including the effect of base, solvent, temperature, time and CO pressure on carbonylative cyclization reaction using ImmPd-IL catalyst
the N-arylation products obtained by irradiation of phthalonimide in benzene in the presence of an amine and oxygen. Normal carbonyl reactivity is observed in the photochemical reactions of phthalonimide with furan (oxetane formation) and hydrogen donors (photoreduction).
An intermolecular nickel-catalyzedaddition reaction has been developed where N-arylphthalimides react with alkynes to afford substituted isoquinolones. A mechanistic rationale is proposed, implying nucleophilic attack of Ni(0) to an amide as the primary step of the catalytic cycle.