In the lipophilic extracts from Streptomyces cinnamomeus 2-ethyl-5-(3-indolyl)oxazole (1a) was detected by chemical screening methods. The structure of the crystalline 1a was determined by spectroscopic and X-ray analysis. The new mono- and dibromo derivatives 1b and 1c are described. 1a is identical with pimprinethine and belongs to a group of microbial indole alkaloids, which can be regarded ...

The title compound, C(20)H(20)Br(2)ClN(3)O(3), was synthesized by the condensation reaction of 2-chloro-5-nitro-benzaldehyde with 4-(2-amino-3,5-dibromo-benzyl-amino)cyclo-hexa-nol in a methanol solution. There are two independent mol-ecules in the asymmetric unit and in one mol-ecule the atoms of the cyclo-hexane ring are disordered over two sets of sites with refined occupancies of 0.657 (12)...

In the title compound, C(13)H(8)Br(2)N(2)O(6), the 2-furyl ring is essentially planar, with a maximum deviation of 0.002 (2) Å. It is inclined at an angle of 33.94 (9)° to the benzene ring. Both nitro groups are slightly twisted away from their attached rings; the dihedral angles are 4.6 (2)° between the nitro group and the 2-furyl ring, and 13.72 (19)° between the nitro group and the benzene r...

In the title compound, C(13)H(8)Br(2)ClNO(4), the linking -CHBr-CHBr- fragment is disordered over two orientations with refined site occupancies of 0.512 (11) and 0.488 (11). The dihedral angle between the furan ring and the phenyl ring is 21.86 (16)°. In the crystal, the mol-ecules are linked into [011] chains by inter-molecular C-H⋯O hydrogen bonds.

IN THE TITLE COMPOUND [SYSTEMATIC NAME: 4-(2,3-dibromo-3-phenyl-propano-yl)-3-phenyl-1,2,3-oxadiazol-3-ylium-5-olate], C(17)H(12)Br(2)N(2)O(3), the oxadiazole ring is essentially planar, with a maximum deviation of 0.001 (3) Å. The central oxadiazole ring makes dihedral angles of 73.3 (2) and 29.0 (2)° with the adjacent and remote phenyl rings, respectively. In the crystal, adjacent mol-ecules ...

A series of 4,5-dibromo-2-(4-substituted phenyl)hexahydro-3a,6-epoxyisoindol-1(4H)-ones were synthesized by reaction the corresponding 2-(4-substituted phenyl)-2,3,7,7a-tetrahydro-3a,6-epoxyisoindol-1(6H)-ones with [(Me2NCOMe)2H]Br3 in dry chloroform under reflux for 3−5 h. In contrast to 4-F and 4-Cl substituents, one bromine atoms isoindole moiety behaves as a halogen bond donor formation int...

In the title compound, C(13)H(9)Br(2)NO(4), the phenyl and 2-nitro-furan rings are linked by a 2,3-dibromo-propanal group, six atoms of which, including a furyl C atom, are disordered over two positions with a site-occupancy ratio of 0.733 (11):0.267 (11). The dihedral angle between the furan [maximum deviation = 0.028 (4) Å] and phenyl rings in the major component is 16.9 (3)°. In the minor co...

In the title compound, C(15)H(9)Br(2)Cl(2)FO, the dihedral angle between the two aromatic rings is 6.0 (1)°. The dibromo-ethane fragment of the propan-1-one unit is disordered over two positions, with occupancies of ca 0.83 and 0.17. The crystal structure is stabilized by inter-molecular C-H⋯O hydrogen bonds, C-H⋯π inter-actions, and Br⋯Cl [3.505 (2) and 3.576 (6) Å] and Cl⋯F [3.176 (2) Å] shor...