A5027367033- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Catalytic C–H Functionalization Methods
- Radical Photochemical Reactions
- Organoboron and organosilicon chemistry
- Catalytic Cross-Coupling Reactions
- Synthetic Organic Chemistry Methods
- Asymmetric Hydrogenation and Catalysis
- Crystallography and molecular interactions
- Coordination Chemistry and Organometallics
- Chemical Synthesis and Reactions
- Carbon dioxide utilization in catalysis
- Cyclopropane Reaction Mechanisms
- Inorganic and Organometallic Chemistry
- Fluorine in Organic Chemistry
- Organometallic Complex Synthesis and Catalysis
- Supramolecular Chemistry and Complexes
- Synthesis and Reactions of Organic Compounds
- Synthesis and Biological Evaluation
- Catalysis for Biomass Conversion
- Oxidative Organic Chemistry Reactions
- Chemical Reactions and Isotopes
TIFR Centre for Interdisciplinary Sciences
2018-2023
Tata Institute of Fundamental Research
2020-2023
University of Hyderabad
2018-2021
Herein we report secondary pyrrolidin-2-ols as a source of cyclic (alkyl)(amino)carbenes (CAAC) for the synthesis CAAC-Cu
CAAC–CAAC dimers with alkylene spacers are presented. These compounds electron-rich and undergo one- two-electron oxidation.
Herein, a new type of carbodicarbene (CDC) comprising two different classes carbenes is reported; NHC and CAAC as donor substituents compare the molecular structure coordination to Au(I)Cl those NHC-only CAAC-only analogues. The conjugate acids these three CDCs exhibit notable redox properties. Their reactions with [NO][SbF
The isolation of carbon-centered diradicals is always challenging due to synthetic difficulties and their limited stability. Herein we report the synthesis a trans-1,4-cyclohexylene bridged bis-NHC-CAAC dimer derived thermally stable dicationic diradical. diradical character this compound was confirmed by EPR spectroscopy. variable temperature study suggests singlet state be marginally more than triplet (2J = -5.5 cm-1 (ΔE ST 0.065 kJ mol-1)). presence bridge instrumental for successful...
Abstract This work presents a stepwise reversible two‐electron transfer induced hydrogen shift leading to the conversion of bis‐pyrrolinium cation an E ‐diaminoalkene and vice versa. Remarkably, forward reverse reaction, which are both reversible, follow two completely different reaction pathways. Establishing such unprecedented property in this type processes was possible by developing novel synthetic route towards starting dication. All intermediates involved backward reactions were...
Reduction of 2-H-substituted pyrrolinium cations via initially formed secondary radicals results in either dimerisation or H-abstracted products, while the outcome depends on N-substituents. The resultant central carbon-carbon single bond dimerised 2,2'-bipyrrolidine derivatives can be oxidised chemically and electrochemically. notably air moisture-stable dimers were subsequently utilised as a source two electrons various chemical transformations.
Herein we report the development of a new methodology for synthesis various quinodimethane derivatives under two-electron oxidation bis-N-heterocyclic olefins linked by different π-conjugated aromatic spacers. In case para- and ortho-phenylene bridge, obtained air moisture stable diimidazolium ortho-quinodimethane derivatives. Analogues para-phenylene spacer such as tetrafluoro-p-phenylene p-anthracene also led to corresponding This emphasizes influence imidazolium substituents which...
Crystalline (amino)(carboxy)-based diradicals were synthesized from newly designed N , ′- trans -1,4-cyclohexylene bridged bis-CAACs. A half-field EPR signal unambiguously confirms their triplet diradical character.
Abstract Herein we report secondary pyrrolidin‐2‐ols as a source of cyclic (alkyl)(amino)carbenes (CAAC) for the synthesis CAAC‐Cu I ‐complexes and thiones when reacted with Cu ‐salts elemental sulfur, respectively, under reductive elimination water from carbon(IV)‐center. This result demonstrates convenient facile access to CAAC‐based ‐salts, which are well known catalysts different organic transformations. It further establishes alcohols be viable carbenes—realizing after 185 years Dumas’...
The monoesters and diesters of glucose-derived isosorbide (IS) have potential applications as sustainable dispersants, surfactants, emulsifiers, monomer units for polymers, plasticizers. This work reports a solvent-free, high-yielding, scalable pathway producing the IS by transesterification reaction using K2CO3 an efficient, inexpensive, recyclable base catalyst. In case monoesters, selectivity toward exo-monoester was found higher than that endo-monoester. methodology successfully extended...
Alkenes are known to undergo oxidation radical cations and dications. The often highly reactive not stable under air. Herein, we report the synthesis, isolation, characterization, molecular structure of an alkene-derived cation A, which is in air both solid state solution. access this compound was facilitated from E-diamino tri-substituted alkene B as a synthon for synthesis A through one-electron oxidation. synthesized by two-electron reduction N,N'-1,2-propylene-bridged...