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Naphthalene sponges

PhCH20CH2Cl, Nal, proton sponge [l,8-bis(dimethylamino)naphthalene], 84% yield. BOMBr can also be used. ... [Pg.36]

Similar statements for IP(tt4) can be made for the two diaminonaphthalenes (15,16). Peri-substituted naphthalenes are examples of molecules with strong intramolecular crowding which can result in unique physicochemical properties. 1,8-Bis(dimethylamino)naphthalene (19) ( proton sponge 88,89) has been found to have an... [Pg.176]

Scheme 9.27 Decarboxylative allylic amidation. Proton sponge = 1,8-Bis-(dimethylamino)-naphthalene. Scheme 9.27 Decarboxylative allylic amidation. Proton sponge = 1,8-Bis-(dimethylamino)-naphthalene.
Some consideration was given to appropriate bases for this oxidation system. Pyridine and sodium bicarbonate had been shown to be useful earlier and were included. Additional bases considered were a proton sponge (1,8-Bis(dimethylamino)naphthalene) and, as stated above, pyridine N-oxide. Because of the low solubilities in CXL systems of NaHCOs and the proton-sponge, pyridine was selected for these exploratory studies. [Pg.450]

Pyrrolidines piperidines.D Suitably unsaturated a-iodo (or a-bromo) esters cyclize to pyrrolidines or piperidines in the presence of this Pd(0) catalyst and 1,8-bis(dimethylamino)naphthalene (proton sponge). [Pg.293]

The acylate anion from Mn(CO)3(j/-C5H5) and LiMe reacts similarly reaction with l,8-bis(dimethylamino)naphthalene (proton sponge) affords the vinylidene, although in this reaction, it is the binuclear complex which is isolated as the final product (38) ... [Pg.69]

The Potential Energy Shape for the Proton Motion in Protonated Naphthalene Proton Sponges (DMAN-s) and its Manifestations... [Pg.371]

Abstract The problem of the low-barrier hydrogen bond in protonated naphthalene proton sponges is reviewed. Experimental data related to the infra-red and NMR spectra are presented, and the isotope effects are discussed. An unusual potential for the proton motion that leads to a reverse anharmonicity was shown The potential energy curve becomes much steeper than in the case of the harmonic potential. The isotopic ratio, i.e., vH/VD (v-stretching vibration frequency), reaches values above 2. The MP2 calculations reproduce the potential energy curve and the vibrational H/D levels quite well. A critical review of contemporary theoretical approaches to the barrier height for the proton transfer in the simplest homoconjugated ions is also presented. [Pg.371]

A.F. Pozharskii, Naphthalene proton sponges (naftalinovye protonnye gubki). Usp. Khim. 67,... [Pg.384]

A.V. Degtyarev et al., 2,7-Disubstituted proton sponges as borderline systems for investigating barrier-free intramolecular hydrogen bonds. Protonated 2,7-bis(trimethylsilyl)-and 2,7-di (hydroxymethyl)-l,8-bis(dimethylamino)naphthalenes. Tetrahedron 64, 6209-6224 (2008)... [Pg.385]


See other pages where Naphthalene sponges is mentioned: [Pg.951]    [Pg.986]    [Pg.951]    [Pg.986]    [Pg.134]    [Pg.141]    [Pg.24]    [Pg.1057]    [Pg.472]    [Pg.73]    [Pg.435]    [Pg.436]    [Pg.150]    [Pg.321]    [Pg.323]    [Pg.324]    [Pg.325]    [Pg.67]    [Pg.89]    [Pg.166]    [Pg.54]    [Pg.251]    [Pg.1082]    [Pg.261]    [Pg.113]    [Pg.113]    [Pg.138]    [Pg.31]    [Pg.222]    [Pg.302]    [Pg.371]    [Pg.472]    [Pg.80]    [Pg.83]    [Pg.84]    [Pg.188]   


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Cations naphthalene proton sponges

Naphthalene proton sponges

Protonated naphthalene proton sponges

Sponges

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