pyrrole ring造句

• Oxidation of the resulting ring yields the final pyrrole ring C.
• In chemical terms, bilins are linear arrangements of four pyrrole rings ( tetrapyrroles ).
• This nucleus is made up of two pyrrole rings bonded by one carbon and one nitrogen.
• Pyrrole rings such as porphyrins have also been used in coating nanomaterials or semiconductors for both homogeneous and heterogeneous catalysis.
• Two molecules of dALA are then combined by porphobilinogen synthase to give porphobilinogen ( PBG ), which contains a pyrrole ring.
• When researching pyrrole ring of structure K in fig . 4 was replaced by a series of aromatic systems having various substitution patterns.
• These are compounds containing an indole moiety, which consists of pyrrole ring fused to benzene to form 2, 3-benzopyrrole.
• They have four pyrrole rings, each ring consisting of C4H4NH . The main role of the tetrapyrroles is their connection in the biological oxidation process.
• It contains the biochemically rare element cobalt ( chemical symbol "'Co "') positioned in the center of a planar tetra-pyrrole ring called a corrin ring.
• This fragment is then able to react with the masked carbanion formed from the PLP mediated decarboxylation of L-Serine, which cyclizes in a dehydration reaction to yield the second pyrrole ring.
• Porphin is an organic compound that is aromatic and heterocyclic since its chemical structure, shown at right, essentially consists of four pyrrole rings joined together by four methine ( = groups to form a larger macrocycle ring.
• Ring A is synthesized from L-proline through the nonribosomal peptide synthase ( NRPS ) pathway ( figure 2 ), wherein the pyrrolidine ring of proline is oxidized twice through FAD + to yield pyrrole ring A.
• "' Extented porphyrins "', or porphyrins with extended pi-system, form a class of porphyrins in which the pyrrole rings are fused with external aromatic fragments via the ?-carbon atoms.
• One advantage of the Bartoli indole synthesis is the ability to produce indoles substituted on both the carbocyclic ring " and " the pyrrole ring, which is difficult to do with the Leimgruber-Batcho indole synthesis.
• Any compound structurally derived from 3 ( 1 naphthoyl ) pyrrole by substitution at the nitrogen atom of the pyrrole ring by alkyl, alkenyl, cycloalkylmethyl, cycloalkylethyl or 2 ( 4 morpholinyl ) ethyl, whether or not further substituted in the pyrrole ring to any extent and whether or not substituted in the naphthyl ring to any extent.
• Any compound structurally derived from 3 ( 1 naphthoyl ) pyrrole by substitution at the nitrogen atom of the pyrrole ring by alkyl, alkenyl, cycloalkylmethyl, cycloalkylethyl or 2 ( 4 morpholinyl ) ethyl, whether or not further substituted in the pyrrole ring to any extent and whether or not substituted in the naphthyl ring to any extent.