Our previous total synthesis of the proposed structures of jiangrines C and D shows that the characteristic data of synthetic samples did not match those of the natural ones, prompting us to revise their structures. Accordingly, we now accomplished the total synthesis of jiangrines A, C and D, which confirms our deduction that their molecular skeletons should compose of 2,3-disubstituted pyrrol...

The title hydrate, C(10)H(10)N(4)·H(2)O, shows a small twist in the hydro-zone derivative, the dihedral angle between the pyridine and pyrrole rings being 11.08 (12)°. The pyridine and pyrrole N atoms lie to the same side of the mol-ecule being sustained in place by hydrogen-bonding inter-actions with the water mol-ecule. Further inter-molecular O-H⋯N and N-H⋯O hydrogen bonding leads to the for...

The title compound, C(15)H(15)NO(3), contains a carbazole skeleton with an ethoxy-carbonyl group at the 3 position. In the indole ring system, the benzene and pyrrole rings are nearly coplanar, forming a dihedral angle of 1.95 (8)°. The cyclo-hexenone ring has an envelope conformation. In the crystal structure, pairs of strong N-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers...

A convenient and efficient methodology for the synthesis of densely substituted pyrrole-fused isocoumarins, which employs solid-supported silica sulfuric acid (SSA) as catalyst, has been developed. When the mixture of ninhydrin adducts of acetylacetone/ethyl acetoacetate and primary amines was heated on the solid surface of SSA under solvent-free conditions, the pyrrole-fused isocoumarins were ...

In the title compound, C(16)H(18)N(4)O(3)·2H(2)O, the dihedral angle between the pyrrole and pyridine rings in the hydrazone mol-ecule is 7.12 (3)°. In the crystal structure, inter-molecular N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds link the hydrazone and water mol-ecules into double layers parallel to (101). The crystal packing exhibits weak π-π inter-actions between the pyrrole and pyridine rings...

Addition of N-ylides derived from DABCO to chalconimines takes place through a Michael addition-cyclization pathway to afford fused cyanopyrroles and/or spirocyclopropanes. The product profile depends heavily on the nature of chalconimines. While 6-membered cyclic chalconimines provide a mixture of pyrrole and spirocyclopropane, 5-membered chalconimines furnish exclusively spirocyclopropane. Cy...

Acetylcholinesterase-inhibiting activity of marinoquinoline A (1), a new pyrroloquinoline from a novel species of a marine gliding bacterium Rapidithrix thailandica, was assessed (IC(50) 4.9 microM). Two related pyrrole derivatives, 3-(2'-aminophenyl)-pyrrole (3) and 2,2-dimethyl-pyrrolo-1,2-dihydroquinoline (4), were also isolated from two other strains of R. thailandica. The isolation of 3 fr...

Both imine bonds of the title compound, C(21)H(21)N(3)O(4)S(2), were found to be in the E configuration. The terminal pyrrole and thio-phene rings are twisted by 2.5 (3) and 2.3 (2)°, respectively, from the mean plane of the central thio-phene to which they are attached. The structure is disordered by exchange of the terminal heterocyclic rings; the site occupancy factors are ca 0.8 and 0.2. Th...

Considerable evidence is emerging to show the possibility of the prebiotic genesis of biological organic compounds from the primitive atmosphere. Notable among these compounds, following the synthesis of amino acids by Miller,' are dipeptides, polypeptides, proteinoids, adenine, guanine, pentose sugars, deoxyadenosine, adenosine 5'-triphosphate (ATP), nucleotides, and fatty acids, as recently s...