Bis methanol

In MeOH + HC104, was independent of cHcio4 as well as of v thus it has been taken as E0=o of Sb in MeOH (Table 18). The values of Cf derived from the experimental data724 are somewhat lower than for the Bi/methanol interface. 

Similar to their spontaneous 1,4-hydration in water, heterocycles 49a, 50a-e, and 50g all react simply upon dissolution in warm methanol to form his-addition products. The X-ray crystal structure of the bis-methanol adduct (51) derived from the diazaborine 50b clearly showed it to be a zwitterion comprised of tetrahedral borate anion and formamidinium cation fragments. Once again, 50f proved to be the only exception A weakly chelated dimethylborate ester (not shown) was found to be its structure in MeOH by B NMR. 

Synthesized (Fig. 28) in 32% yield [51,52] starting from 1,5-dihydroxy-naphthalene, the macrocyclic polyether 20 contains a 1,5-dioxynaphthalene unit and a bis(methanol)TTF ring system, linked in a cyclic fashion by two tetraethylene glycol chains. When this macrocyclic polyether was reacted with the precursors to CBPQT4+, the resulting [2]catenane 214+ was formed in 23% yield. 

Fig. 28. Synthesis of the electrochemically switchable [2]catenane 21-4PF6. Obtained in 55% yield from the naphthalene-containing dibromide and bis(methanol)TTF, the crown ether 20 can be catenated under standard conditions to give the [2]catenane 21-4PF6 in 23% yield. As well as the expected n-n interactions, a strong [C—H- O] hydrogen bond is also observed...

Ozonolysis in the presence of NaOH or NaOCHs bi methanol with CH2CI2 as a cosolvent leads to formation of esters. This transformation proceeds by trapping both the carbonyl oxide and aldehyde products of the fragmentation step. " ... 

Pakhomova, S., Ondracek, J., Kratochvil, B. and Jegorov, A. (1996b) Crystal structure of 12 -hydroxy-2 -methyl-3, 6, 18 -trioxo-5 a-(phenylmethyl) ergotamanium tartrate bis(methanol) solvate, C37H46N5O10. Z. Kristallogr., 211, 555-556. 

C20H30N6O6, Cyclo-bis(glycyl-L-prolyl-D-alanyl), 45B, 528 Cyclohexasarcosyl bis(methanol), 43B, 619 N-Benzyloxycarbonyl-L-isoleucine 4-nitroguaiacyl ester. 

C4 6H4 aBFglrNaOaPa, (2-Trifluoromethylphenylhydrazido)fluorocarbonyl-bis(triphenyIphosphine)iridium tetrafluoroborate bis(methanol),... 

C5 uH8oClaCui,Ni 2O22 / Bis(perchlorato)bis[ 1-(N,N-dimethyl-2-aminoeth-yl)-1-phenyl-2-oximatopropane]dicopper bis(methanol)bis[1-(N,N-di-methyl-2-aminoethyl)-1-phenyl-2 OXimatopropane]dicopper bis(perchlorate), 45B, 1051... 

C19H1gCoFgOgS2, cis-Bis(1-(2-thienyl)-4,4,4-trifluoro-1,3-butane-dionato)bis(methanol)cobalt(II), 44B, 827 Cl9H1gFgOgS2Zn, cis-Bis(1-(2-thienyl)-4,4,4-trifluoro-1,3-butane-dionato)bis(methanol)zinc(II), 44B, 827 Cl9H20CUF12NOg, Bis(hexafluoroacetylacetonato)(4-hydroxy-2,2,6,6-tetramethylpiperidinyl-N-oxy)copper(II), 46B, 976 Cl 9H2 iCuNOii, Bis(acetylacetonato)quinolinecopper (II), 34B, 498 Cl9H3sAsCoNflOi5, (-)-Acetylacetonatobis(trimethylenediamine)cobalt-(III) arsenic(IIl) (+)-tartrate monohydrate, 39B, 663 CaoHAAmCsFjiiOe, Caesium tetrakis(hexaf luoroacetylacetonato)ameri-cate, 34B, 500... 

C10H2 oCuOi0 f Bis(methanol)tetraacetatodicopper(II), 45B, 1112 CioH2oKe03aU2, Potassium uranyl oxalate hydrate, 42B, 784 CloH2aCuN20i0, Bis(2-hydroxyethyliminopyruvato)copper(II) tetrahydrate, 34B, 529... 

C20H28CUN2O2 0.7 CgHg, Bis-l-ephedrinecopper(II) benzene, 29, 609 C20H32N2NiOi0, Diaquobis(L-tyrosinato)nickel(II) bis(methanol), 43B, 1270... 

Cl6F36M0O5, Tetrakis(t-perfluorobutoxy)oxomolybdenum(VI), 46B, 1150 Cl6H10CU2F12O8, Bis(1,1,1,7,7,7-hexafluoroheptane-2,4,6 trionato)-bis(methanol)dicopper(II), 46B, 1151 Cl6HioHg3N802Sg, Mercury(ll) thiocyanate - pyridine-N-oxide (3 2), 42B, 489... 

Related V complexes show activity toward the oxidative decomposition of pinacol with C—C bond cleavage and aerobic oxidation of 4-methoxybenzylalcohol and other lignin model compounds." Other oxidovanadium(V) complexes with c 5-2,6-bis-(methanolate)-piperidine ligands of the type depicted on Scheme 3 were appHed as catalysts to convert prochiral alkenols into 2-(tetrahydrofiiran-2-yl)-2-propanols, 2-(tetrahydropyran-2-yl)-2-propanols, oxepan-3-ols and epoxides, upon oxidative alkenol cyclization with TBHP as oxidant (Scheme 3)." These catalysts are rather stable and possess improved chemoselectivity, e.g., epoxidation of geraniol occurs enantioselectively. It was ruled out the vanadium(V) ieri-butyl peroxy complex formation is a key step to activate peroxides. 

Scheme 3 Example of c/s-2,6-bis- methanolate)-piperidine ligands (A) and oxidation of alkenols by TBHP, catalyzed by the piperidine-derived vanadium complexes (B). ...

Donges M, Amberg M, Stapf G, Kelm H, BergstraBer U, Hartung J. cis-2,6-Bis-(methanolate)-piperidine oxovanadium(V) complexes as catalysts for oxidative alkenol cyclization by tert-butyl hydroperoxide. Inorg Chim Acta. 2014 420 120-134. 

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