N- pyrroles

This section deals mainly with nitrogen-containing, eight-membered heterocycles that are able to form a fully conjugated n-electron system, including both 8 n ( pyrrole type ) and iOn ( pyridine type ) systems, i.e. the free lone pair electrons of the heteroatom incorporated, or not incorporated, in conjugation. [Pg.509]

Anionic polymerization of lactams was shown to proceed according to what is called the activated monomer mechanism. With bischloroformates of hydroxy-terminated poly(tetramethyleneglycol) and poly(styrene glycol) as precursors for a polymeric initiator containing N-acyl lactam ends, block copolymers with n-pyrrol-idone and e-caprolactam were obtained by bulk polymerizations in vacuum at 30 and 80 °C, respectively361. ... [Pg.30]

Fe(TPP)(CCl2)(H20)] is not significantly displaced from the porphyrin plane. Despite the different structures of [Fe(F20-TPP)CPh2], [(Melm)Fe(F2o-TPP) CPh2], and [Fe(TPP)(CCl2)(H20)], the average Fe-N(pyrrole) distances in these three complexes are similar. [Pg.117]

The reaction proceeds smoothly at 80-100°C in the presence of 30% (of the ketoxime mass) KOH in DMSO in an autoclave under an initial acetylene pressure of 8-16 atm. The highest pressure developed when the reaction mixture reached a prescribed temperature, is 20-25 atm. Then fast absorption of acetylene starts and the pressure reduces rapidly. For preparing /V-vinylpyrroles at least a twofold excess of acetylene is employed. If the corresponding N//-pyrrole is to be obtained the synthesis is performed with the calculated or a deficient amount of acetylene. Here again, lithium hydroxide is a selective catalyst for pyrrole ring formation. When LiOH is used, no precise batching of acetylene is required. [Pg.212]

While interesting neutral alternatives to the unsaturated expanded porphyrin derivatives, calix[n] pyrroles (n = 4, 5, 6, 8) are relatively limited in their scope for anion binding because of the constraints of the cavity size. Nevertheless pyrroles linked by an sp3 hybridised carbon atom are of considerable interest because of their resemblance to the anti-cancer agents the prodigiosins (Section 4.2.4), moreover pyrrole anion-receptor chemistry is synthetically versatile and hence a range of acyclic pyrroles and hybrid amidopyrroles such as 4.50-4.52 have been developed, particularly by the groups of... [Pg.291]

Diazo-, dlazonium- Pyridine-N Imino-N Pyrrole-N Cyanides Isocyanides 0 Iran iter nes ii mer pyr, frazo vidir es es ... [Pg.15]

The X-ray crystal structure of 3,4-dichoro-l//-pyrrole-2,5-dicarboxylic acid bis-phenylamide tetrabutylammonium salt reveals the formation of an unusual dimer in the solid state via amide NFI- -N pyrrole hydrogen bonds... [Pg.5]

As stated in Section 6.2.1 (p. 154), no examples ofr) (N) pyrrole complexes are known, and the corresponding analogues reported for indole are better described as Tl N-3H-indolenine species. Tlierefore the N-only coordination mode of intact Pyr or In does... [Pg.168]

Azo compounds Diazo-, diazonium Pyridine-N Imino-N Pyrrole-N Cyanides Isocyanides Guanidines Sulfonamides Thioamides Amides Thioureas, ureas j Enamines Anilines Amines... [Pg.15]

Morgan GF, Abram U, Evrard G, Durant F, Deblaton M, Clemens P, Vandenbroeck P, Thornback JR (1990) Structural Characterization of the new brain imaging agent [ " Tc] [TcO(L)], H3L=N-4-oxopentan-2-ylidene-N -pyrrol-2-ylmethylen-ethane-l,2-diamine (MRP20). J Chem Soc Chem Comm 24 1772-1773... [Pg.25]

N-Pyrrole-2-carbonitrile microwave, 4, 4 (80JPC1767), 5 (75JHC433, 78JCS(P2)42, 78T1641)... [Pg.55]

N-Pyrrole-2-carboxamide, N,N-dimethyl-AGrot, 4, 34 (76JOC3591, 77T1337), 194 (76JOC3591)... [Pg.55]

N-Pyrrole-1-carboxylic acid, methyl ester H NMR, 4, 166 (67T4469)... [Pg.55]

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