نتایج جستجو برای: two step surface reactions
تعداد نتایج: 3221752 فیلتر نتایج به سال:
Abstract The exact shape of intracranial aneurysms is critical in medical diagnosis and surgical planning. While voxel-based deep learning frameworks have been proposed for this segmentation task, their performance remains limited. In study, we offer a two-step surface-based pipeline that achieves significantly better results. Our model takes surface an entire set principal brain arteries conta...
The first chemical total synthesis of the highly oxygenated polyketide enterocin has been accomplished. key step was a late-stage biomimetic reaction cascade involving two intramolecular aldol reactions in which each proceeded 52 % yield (averaged) and established four seven stereogenic centers. pivotal precursor for assembled from three readily available building blocks. A chiral dithioacetal ...
The mechanism of the ene reaction of singlet ((1)delta(g)) oxygen with simple alkenes is investigated by a combination of experimental isotope effects and several levels of theoretical calculations. For the reaction of 2,4-dimethyl-3-isopropyl-2-pentene, the olefinic carbons exhibit small and nearly equal (13)C isotope effects of 1.005-1.007, while the reacting methyl groups exhibit (13)C isoto...
An efficient amino acid-/self-/base-/ruthenium-/thermal-catalyzed two-step process for the synthesis of functionalized drug-like carbocycles was achieved through combinations of cascade TCRA/C-allylation/enyne-RCM/Diels-Alder reactions as key steps starting from simple acyclic substrates. In this communication, we report the two-step synthesis of drug-like carbocycles through a combination of o...
• Charge transfer is a common feature for catalytic reactions. Ion involved in large category of reaction. through interfaces and bulk phase catalysis discussed. steps are crucial energy transformation devices. In recent decades, has witnessed increasing interests many reactions with interface charge as distinguished feature. Here, the can be cations, anions, electrons or holes. Research into b...
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