Hydrogen Atom Transfer-Driven Enantioselective Minisci Reaction of Amides
نویسندگان
چکیده
منابع مشابه
Hydrogen Atom-formaldehyde Reaction
where H-H-C and H-D-C are weak bonds and make a negligible contribution, leads to a value of -2 kcal. Therefore, E5-E2=1 kcal compared with the experimental value of 1.0 kcal. The preexponential factor for this pair of isotopic reactions can be calculated from the difference in the entropies of activation. Using the same loose complex as above and applying the expression derived by Bigeleisens ...
متن کاملThe Periodically Driven excited Hydrogen Atom
This article describes the e ects of relatively strong, periodic perturbations on the classical and quantum dynamics of excited hydrogen atoms and the relation between these two dynamics. By considering a range of driving frequencies it is shown how the relative ratio of this to the unperturbed atomic frequencies a ects the response and the relation between the classical and quantum dynamics. A...
متن کاملUltrafast excited state hydrogen atom transfer in salicylideneaniline driven by changes in aromaticity.
We investigated two important unresolved issues on excited state intramolecular proton transfer (ESIPT) reactions, i.e., their driving force and the charge state of the transferred species by means of quantum chemical topology. We related changes in the aromaticity of a molecule after electron excitation to reaction dynamics in an excited state. Additionally, we found that the conveyed particle...
متن کاملEnantioselective synthesis of highly functionalised amides by copper-catalysed vinylogous Mukaiyama aldol reaction.
Amides with quaternary stereogenic centers have been synthesised by catalytic asymmetric vinylogous Mukaiyama aldol reactions. The chiral copper-sulfoximine catalyst gives rise to products with moderate to good yields and up to 92% ee.
متن کاملFemtosecond real-time probing of reactions. IX. Hydrogen-atom transfer
The real-time dynamics of hydrogen-atom-transfer processes under collisionless conditions are studied using femtosecond depletion techniques. The experiments focus on the methyl salicylate system, which exhibits ultrafast hydrogen motion between two oxygen atoms due to molecular tautomerization, loosely referred to as intramolecular “proton” transfer. To test for tunneling and mass effects on t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 2021
ISSN: 0002-7863,1520-5126
DOI: 10.1021/jacs.1c01556