Publications by authors named "A Tolmachev"

The chemoselectivity of halo(het)arene sulfonyl halide aminations is studied thoroughly under parallel synthesis conditions, and the scope and limitations of the method are established. It is shown that SAr-reactive sulfonyl halides typically undergo sulfonamide synthesis during the first step; the second amination is also possible provided that the SAr-active center is sufficiently reactive. On the contrary, sulfonyl fluorides bearing an arylating moiety undergo selective transformation at the latter reactive center under proper control.

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Chemoselective transformations of functionalized sulfonyl fluorides and chlorides are surveyed comprehensively. It is shown that sulfonyl fluorides provide an excellent selectivity control in their reactions. Thus, numerous conditions are tolerated by the SO F group - from amide and ester formation to directed ortho-lithiation and transition-metal-catalyzed cross-couplings.

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Article Synopsis
  • The study focuses on modifying the surface of biodegradable Mg alloys by creating porous diatomite coatings using micro-arc oxidation at voltages between 350-500 V.
  • The addition of ZrO microparticles to these coatings was investigated for its impact on their structure and properties.
  • Results showed that while the coatings were mainly composed of small pores (<1 μm), higher voltages increased larger pores (5-10 μm), and the addition of ZrO significantly improved adhesive strength by 30% and enhanced corrosion resistance dramatically.
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Objective: Evaluation of the safety and effectiveness of thrombolytic therapy (TLT) with the drug Revelisa (alteplase) in patients with ischemic stroke (AI) in real clinical practice.

Material And Methods: An open prospective multicenter non-interventional register study was conducted, which included 550 patients with AI - 259 (47.1%) women and 291 (52.

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