- Sunlight assisted solvent free synthesis of tert-butylperesters
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A green and efficient methodology has been developed for the direct conversion of aryl aldehydes to the corresponding tert-butyl peresters. The reaction has been carried out in absence of any solvent and the sunlight is used as the green source of energy. In this reaction tetrabutylammonium iodide (TBAI) acts as the mild organo catalyst and tert-butyl hydroperoxide (TBHP) serve as the source of tert-butyl group.
- Shit, Prasenjit,Singha, Raju
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supporting information
p. 1 - 6
(2020/07/15)
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- Catalytic asymmetric epoxidation of α,β-unsaturated carboxylic acid imidazolides and amides by lanthanide-BINOL complexes
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Highly enantioselective catalytic asymmetric epoxidation of α,β-unsaturated carboxylic acid imidazolides and simple amides was developed. In the presence of 5-10mol% of lanthanide-BINOL complexes, the reaction proceeded smoothly with high substrate generality. In particular, in the cases of α,β-unsaturated amides, there was nearly perfect enantioselectivity (>99% ee). The corresponding epoxides were successfully transformed into many types of useful chiral compounds such as α,β-epoxy esters, α,β-epoxy amides, α,β-epoxy aldehydes, α,β-epoxy β-keto ester, and α- and β-hydroxy carbonyl compounds. B3LYP density functional studies were performed to predict substrate reactivity.
- Ohshima, Takashi,Nemoto, Tetsuhiro,Tosaki, Shin-Ya,Kakei, Hiroyuki,Gnanadesikan, Vijay,Shibasaki, Masakatsu
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p. 10485 - 10497
(2007/10/03)
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- Mass Spectral Fragmentations and Gas Phase Reactions of t-Butyl Peresters
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The mass spectral behaviour of a few aliphatic and aromatic peresters has been studied under electron impact (EI) and chemical ionization (CI) conditions.Under EI, fragmentation of the molecules occurs mainly by C-C cleavage at either side of the carbonyl group.The C4H9O+ ion generated by the attack of the CI reagent on the sample molecule adds on to the molecule leading to (M + 73)+ ion in the CI (i-C4H10) spectra while with the more basic reagent, NH3, clustering of the molecule around NH4+ ion is the predominant pathway for ion formation.
- Madhusudanan, K. P.,Misra, Dharmendra,Singh, Chandan
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p. 398 - 401
(2007/10/02)
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