نتایج جستجو برای: bicyclic compounds derived from 1
تعداد نتایج: 7358886 فیلتر نتایج به سال:
A bicyclic [2.2.2]octadiene framework in which the ethano bridge contains a carbonyl group, an alkynyl and a trimethylsiloxy or hydroxy group has been utilized to generate alkoxyalkynylketenes via a retro-Diels-Alder reaction under relatively mild conditions (138 °C). This is an outstanding result since the retro-Diels-Alder reaction of [2.2.2]bicyclic compounds proceeds quantitatively but at u...
Benzothiazole, the bicyclic ring system consists of thiazole ring fused with benzene ring. The literature study of benzothiazoles reveals that the presence of this bicyclic ring system in various amine or terrestrial natural compounds possess different biological properties. Thus benzothiazole moiety is continuously drawing interest for development of newer drug moiety due to its wide range of ...
A bicyclic depsipeptide, chromopeptide A (1), was isolated from a deep-sea-derived bacterium Chromobacterium sp. HS-13-94. Its structure was determined by extensive spectroscopic analysis and by comparison with a related known compound. The absolute configuration of chromopeptide A was established by X-ray diffraction analysis employing graphite monochromated Mo K α radiation (λ=0.71073 Å) with...
abstract according to increase in electricity consumption in one hand and power systemsreliability importance in another , fault location detection techniqueshave beenrecentlytaken to consideration. an algorithm based on collected data from both transmission line endsproposed in this thesis. in order to reducecapacitance effects of transmission line, distributed parametersof transmission line...
a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...
Fragment-based lead generation has proven to be an effective means of identifying high-quality lead compounds for drug discovery programs. However, the fragment screening sets often used are principally comprised of sp(2) -rich aromatic compounds, which limits the structural (and hence biological) diversity of the library. Herein, we describe strategies for the synthesis of a series of partiall...
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