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Pyrroles, acyl, conformations

Substituents at C(2) and C(4) may affect the conformational equilibrium of 3-acyl derivatives of five-membered heterocycles and examples have been reported for furan, pyrrole, and thiophene compounds (81RCR336). Stabilizing electrostatic interactions may be the origin of the conformational behavior (80JST(67)251) of the thiophene derivatives 21 and 22, which adopt the conformation depicted. [Pg.105]

The spin-coupling of ring protons has been used in studies of the conformation of acyl pyrroles.262,266,464 Restricted rotation about the N-C(O) bond of 1-mesitoylpyrrole has been shown to be less at high... [Pg.469]

Beckmann rearrangement, 4, 292 phototransposition, 4, 204 synthesis, 4, 223 Wittig reaction, 4, 294 Wolff-Kishner reduction, 4, 291 Pyrrole, 1-acyl-barrier to rotation, 4, 193 IR spectra, 4, 21, 181 rearrangement, 4, 41 synthesis, 4, 82 thermal rearrangement, 4, 202 Pyrrole, 2-acyl-acidity, 4, 297 cleavage, 4, 289 conformation, 4, 33... [Pg.813]

See other pages where Pyrroles, acyl, conformations is mentioned: [Pg.127]    [Pg.78]    [Pg.167]    [Pg.72]    [Pg.193]    [Pg.285]    [Pg.193]    [Pg.119]    [Pg.29]    [Pg.188]    [Pg.251]    [Pg.262]   
See also in sourсe #XX -- [ Pg.41 , Pg.94 , Pg.127 ]



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2- pyrroles, conformation

2- pyrroles, conformational

Pyrrole, 3- acylation

Pyrrole, 3-acyl

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