منابع مشابه
Amine-chelated aryllithium reagents--structure and dynamics.
Multinuclear NMR studies of five-membered-ring amine chelated aryllithium reagents 2-lithio-N,N-dimethylbenzylamine (1), the diethylamine and diisopropylamino analogues (2, 3), and the o-methoxy analogue (4), isotopically enriched in (6)Li and (15)N, have provided a detailed picture of the solution structures in ethereal solvents (usually in mixtures of THF and dimethyl ether, ether, and 2,5-di...
متن کاملSnAP reagents for the synthesis of piperazines and morpholines.
Substituted piperazines and morpholines are valuable structural motifs in biologically active compounds, but are not easily prepared by contemporary cross-coupling approaches. In this report, we introduce SnAP reagents for the transformation of aldehydes into N-unprotected piperazines and morpholines. This approach offers simple, mild conditions compatible with aromatic, heteroaromatic, aliphat...
متن کاملAmine- and ether-chelated aryllithium reagents-structure and dynamics.
Chelation and aggregation in phenyllithium reagents with potential 6- and 7-ring chelating amine (2, 3) and 5-, 6-, and 7-ring chelating ether (4, 5, 6) ortho substituents have been examined utilizing variable temperature (6)Li and (13)C NMR spectroscopy, (6)Li and (15)N isotope labeling, and the effects of solvent additives. The 5- and 6-ring ether chelates (4, 5) compete well with THF, but th...
متن کاملA Secure Network Access Protocol (SNAP)
Both the size, and the interconnectivity of computer networks are increasing tremendously. However, the possibility of an attack compromising the network is also increasing, making network security critical. Strong authentication protocols are needed to restrict network access to only authorised users. Most existing protocols for authentication and network access are based on centralised authen...
متن کاملSnAP reagents for the one-step synthesis of medium-ring saturated N-heterocycles from aldehydes.
Interest in saturated N-heterocycles as scaffolds for the synthesis of bioactive molecules is increasing. Reliable and predictable synthetic methods for the preparation of these compounds, especially medium-sized rings, are limited. We describe the development of SnAP (Sn amino protocol) reagents for the transformation of aldehydes into seven-, eight- and nine-membered saturated N-heterocycles....
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ژورنال
عنوان ژورنال: Postdoc Journal
سال: 2016
ISSN: 2328-9791
DOI: 10.14304/surya.jpr.v4n3.7