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The synthesis of the N-aminocarbazole R-NH2 (2) is reported. Subsequent reaction with bis(bis(trimethylsilyl)-amidotetrylenes E[N(SiMe3)2]2 (E = Ge, Sn, Pb) allowed the isolation of formal hydrazidotetrylene derivatives, R-N(H)EN(SiMe3)2 (3), that includes the first example of a hydrazidoplumbylene to date. Thermal decomposition of these compounds resulted in the elimination of "NH" and afforded the tetrylenes R-EN(SiMe3)2 (4).
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Name: Chemistry (Weinheim an der Bergstrasse, Germany)
We have developed a direct method for the synthesis of cis-substituted cyclopropanes from a cyclopropanecarboxamide through stereocontrolled metalation and Negishi coupling. Under the optimized reacti...
Previously unknown the steric heavy atom effect on magnetic anisotropy parameters of triplet phenyl nitrenes is reported. The heavy bromine atom effect is revealed by W-band EPR and theoretical invest...
A new protocol for PTC-mediated O-alkylation of the intraannular position of 20-membered unclosed cryptands (UCs) is reported. In contrast to the classical, "direct" strategy, which requires functiona...
Rhodium carbenes are key intermediates in a range of cycloadditions and insertion reactions. Whereas Rh(II) carbenes bearing acceptor substituents are easily accessed from stabilized diazo compounds, ...
The multicomponent backbone N-modification of peptides on solid-phase is presented as a powerful and general method to enable peptide stapling at the backbone instead of the side chains. We prove that...
Exposure to heavy metals may interfere with basic cellular functions, including DNA synthesis. The aim of the study is to correlate heavy metals concentration in body fluids of repr...
The purpose of this study is to determine if there is a patient satisfaction preference of Fixed Bearing versus Mobile Bearing Unicompartmental Knee Arthroplasty (UKA) in patients who are ...
This study aims to test whether infrared thermal imaging using a non-touch, non-ionising, thermal camera system is feasible and reliable as an independent technique for thermal comfort ass...
The purpose of this randomized, controlled trial is to estimate the safety of early weight bearing on post ankle surgery. Patients who are indicated to have surgery for unstable ankle fra...
A Prospective, Randomized, Controlled Trial Comparing Early Weight Bearing versus Non Weight Bearing Following Modified Lapidus Arthrodesis
A subset of plants bearing a vascular system; examples are ferns and seed-bearing species.
The use of a heavy ion particle beam for radiotherapy, such as the HEAVY IONS of CARBON.
A disorder of immunoglobulin synthesis in which large quantities of abnormal heavy chains are excreted in the urine. The amino acid sequences of the N-(amino-) terminal regions of these chains are normal, but they have a deletion extending from part of the variable domain through the first domain of the constant region, so that they cannot form cross-links to the light chains. The defect arises through faulty coupling of the variable (V) and constant (C) region genes.
A subset of various vascular plants (also known as the Tracheophyta) which include seed-bearing and non seed-bearing species.
The larger subunits of MYOSINS. The heavy chains have a molecular weight of about 230 kDa and each heavy chain is usually associated with a dissimilar pair of MYOSIN LIGHT CHAINS.