نتایج جستجو برای: asymmetric water entry
تعداد نتایج: 682689 فیلتر نتایج به سال:
We report efficient Pd-catalyzed cyclizations of oxime esters with 1,1-disubstituted alkenes as the basis of a general entry to α,α-disubstituted pyrrolidine derivatives. We also demonstrate that catalytic asymmetric variants of this chemistry are feasible by employing a suitable chiral ligand.
We customize the aggregative game approach to oligopoly to study asymmetric media markets. Advertiser, platform, and consumer surplus are tied together by a simple summary statistic. When media are ad-financed and ads are a nuisance to consumers we establish see-saws between consumers and advertisers. Entry of a lower-quality platform increases consumer surplus, but decreases advertiser surplus...
The penetration of a projectile into warship broadside liquid cabin is usually non-ideal process. To explore the protective effects large against rod projectiles and to provide reference for design new structures, ballistic impact tests penetrating at different attack angles were carried out. Combined with numerical calculation, angle on water entry characteristics as well their failure modes s...
The intramolecular Rauhut-Currier reaction creates a carbon-carbon bond between two tethered Michael acceptors. Previous asymmetric versions have relied on 1,4-additions of chiral nucleophilic catalysts. Herein, we investigate a novel strategy that involves the formation of electron rich dienamines as key intermediates. Our methodology provides an efficient entry to the iridoid framework.
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