The title compound, C(6)H(10)N(8)S(2), was prepared by the nucleophilic substitution reaction of 5-mercapto-1-methyl-tetra-zole and dichloro-ethane. In the crystal, the mol-ecule possesses an approximate non-crystallographic twofold symmetry axis. The crystal packing is stabilized by weak inter-molecular C-H⋯N and π-π inter-actions [centroid-centroid distances = 3.448 (6), 3.5085 (5) and 3.4591...

the macrocyclic ligands 2,3,5,6-bis{3’-bromo-5’-tert-butyl benzo-5-phenyl benzo} 12c3 (l1), 2,3,5,6-bis{3’-bromo-5’-tert butyl-benzo-5’-phenyl-benzo}15c4 (l2), 2,3,5,6-bis{3’-bromo-5’-tert butyl-benzo-5’-phenyl-benzo}18c5 (l3) have been synthesized and their alkaline metal compounds with naclo4∙h2o and kclo4  have been prepared. chemical formulas of all compounds have been characterized by usin...

In the title compound, C(12)H(9)BrFNO, the dihedral angle between the aromatic rings is 51.39 (5)°; the C atom of the meth-oxy group is close to being coplanar with its attached ring (r.m.s. deviation = 0.0172 Å] and is oriented away from the pyridine ring. In the crystal, mol-ecules inter-act by van der Waals forces.

Cytotrophoblasts, purified from human term placentae, were cultured in the absence or presence of 8-bromo-cAMP or 8-bromo-cGMP. 8-Bromo-cAMP provoked a dose-dependent increase in the secretion of hCG and progesterone within 24 h. After 48 h, hCG secretion increased by more than 200-fold, and progesterone secretion increased nearly 5-fold. 8-Bromo-cGMP had no effect on hCG secretion. In culture ...