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N-Acyl group migration

Without additional reagents 0- N-Acyl group migration 344. [Pg.362]

Nitramines from 1,1-nitroethylene derivatives G(N02) G with O N-acyl group migration and O-deacetylation... [Pg.105]

Selective and preferential N-acetylation by 0 -N-acyl group migration via selective O-acetylation... [Pg.370]

Bismuth(lll) salts such as BiCls, BiBrj, Bi(OCOR)3, and Bi (OTf), [166] have been widely used as Lewis acid catalysts to mediate C-C bond formation. Bi (OTf) 3, Bi2O3, and BiCl, catalyze Friedel-Crafts acylation with acyl chlorides or acid anhydrides [167]. Both electron-rich and electron-deficient arenes are acylated in high yields under catalysis by Bi(OTf)3 (Scheme 14.82). Under microwave irradiation the catalytic activity of BiX3 (X = C1, OTf) in the acylation of aromatic ethers is enhanced [168]. The N-acyl group of p-substituted anilides migrates to the ortho position of the aromatic nucleus under BiCls catalysis [169]. Treatment of 2,3-dichloroanisole with the ethyl glyoxylate polymer in the presence of a catalytic amount of Bi(OTf)3 affords an a,a-diarylacetic acid ester quantitatively (Scheme 14.83) [170]. [Pg.776]

Pritchina, E. A., Gritsan, N. P., Burdzinski, G. T., Platz, M. S., Study of Acyl Group Migration by Femtosecond Transient Absorption Spectroscopy and Computational Chemistry, J. Phys. Chem. A 2007, 111, 10483 10489. [Pg.521]

N-(diloroglyoxyloyl) iminoesters 26, 458 iminoesters 26,458 -, review 26,458 Acyl migration s. Acyl group migration... [Pg.255]

Medium-ring cyclic ketones via N- C-acyl group migration Q)... [Pg.145]

Acyl group migration and the positions of equilibria in the enol esters (46a and b) of 2-benzoylcycloalkanones and 2-formylcycloalkanones have been studied via n.m.r. For the former K = [a]/[h] = 0.23, oo, and 10 for n = 5, 6, and 7 respectively. Thus for six-membered rings (46a) is completely dominant, but for the five-membered ring the two tilted exocyclic double bonds (46b) are favoured. [Pg.165]

Sodium methoxide 3-Acyloxindole ring closure with N-> C-acyl group migration... [Pg.382]

O-acylation in peptide synthesis 18, 435 suppl. 26 O-acyl group migration 13,255 suppl. 26 allyl rearrangement 27, 578 coupling of halides 11, 731 suppl. 27 epimerization during oxidation 16, 319 suppl. 26 N-quaternization s. under N-Quaternization radical addition 27, 600 reduction of ketones in Grignard syntheses 19, 46 suppl. 26 ring closure, intramolecular 27, 799... [Pg.272]

Ethylene derivs. from carboxylic acids via imidazole N- C-acyl group migration and Norrish type II cleavage Degradation with loss of 2 C-atoms... [Pg.532]

Acyl group migration N-Acyl from O-acyl... [Pg.483]

Aq. NaBH4 added dropwise at 20 to a stirred soln. of corticosterone acetate in dimethylformamide, and the product isolated after 1 hr. zl -pregnen-ll, 20), 21-triol-3-one 20) -acetate. Y 77%.—Mild base catalysis is strikingly effective in promoting acyl migration in the above case. F. e. without acyl group migration s. D. Taub, R. D. Hoffsommer, and N. L. Wendler, Am. Soc. 81, 3291 (1959). [Pg.24]

Photochemical N C-acyl group migration y -Amino-a,y -ethyleneketones from enacylamines... [Pg.181]

See other pages where N-Acyl group migration is mentioned: [Pg.124]    [Pg.127]    [Pg.128]    [Pg.461]    [Pg.63]    [Pg.351]    [Pg.433]    [Pg.47]    [Pg.233]    [Pg.389]    [Pg.389]    [Pg.124]    [Pg.127]    [Pg.128]    [Pg.461]    [Pg.63]    [Pg.351]    [Pg.433]    [Pg.47]    [Pg.233]    [Pg.389]    [Pg.389]    [Pg.195]    [Pg.39]    [Pg.35]    [Pg.48]    [Pg.233]    [Pg.446]    [Pg.246]    [Pg.341]    [Pg.58]    [Pg.127]    [Pg.167]    [Pg.433]    [Pg.516]    [Pg.59]    [Pg.472]    [Pg.472]    [Pg.15]    [Pg.62]    [Pg.238]   
See also in sourсe #XX -- [ Pg.17 , Pg.382 ]

See also in sourсe #XX -- [ Pg.17 , Pg.382 ]

See also in sourсe #XX -- [ Pg.15 , Pg.314 ]



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Acyl group

Acyl group acylation

Acyl migration

Acylation acyl migration

Group migration

Migrating group

Migration acyl groups

N groups

N- -, acylation

N-Acyl

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