N-(4-Chloro-phen-yl)ethanimidamide.

A twisted conformation is found in the title compound, C(8)H(9)ClN(2), with the ethanimidamide residue being twisted substantially to the benzene ring [dihedral angle = 66.54 (14)°]. The conformation about the C=N double bond [1.

2-Chloro-6,6-dimethyl-5,6-dihydro-indazolo[2,3-c]quinazoline.

Two independent but virtually identical mol-ecules comprise the asymmetric unit of the title compound, C(16)H(14)ClN(3). The mol-ecules have a slightly curved shape owing to puckering in the six-membered C(4)N(2) ring; the respective dihedral angles formed between the benzene rings are 12.64 (7) and 11.

N-(4-Chloro-phen-yl)-1,1,1-trifluoro-N-(trifluoro-methyl-sulfon-yl)methane-sulfonamide.

The title mol-ecule, also called 4-chloro-N,N-bis-(trifluoro-methane-sulfon-yl)aniline, C(8)H(4)ClF(6)NO(4)S(2), has non-crystallographic twofold symmetry with the pseudo-axis aligned along the Cl-C⋯C-N backbone of the mol-ecule: the SO(2)CF(3) residues lie to either side of the benzene ring. In the crystal, the presence of C-H⋯O contacts lead to the formation of a sequence of 12-membered {⋯HC(2)NSO}(2) synthons within a supra-molecular chain aligned along [101].

Rearrangement, nucleophilic substitution, and halogen switch reactions of alkyl halides over NaY Zeolite: formation of the bicyclobutonium cation inside the zeolite cavity.

Rearrangement and nucleophilic substitution of cyclopropylcarbinyl bromide over NaY and NaY impregnated with NaCl was observed at room temperature. The first-order kinetics are consistent with ionization to the bicyclobutonium cation, followed by internal return of the bromide anion or nucleophilic attack by impregnated NaCl to form cyclopropylcarbinyl, cyclobutyl, and allylcarbinyl chlorides. The product distribution analysis revealed that neither a purely kinetic distribution, similar to what is found in solution, nor the thermodynamic ratio, which favors the allylcarbinyl halide, was observed.

Design, synthesis and pharmacological evaluation of HIV-1 reverse transcriptase inhibition of new indolin-2-ones.

The design, synthesis and anti HIV-1 replication inhibition of 3-(cyclopropylethynyl)-3-hydroxy-indolin-2-ones, analogues of efavirenz (Sustivatrade mark), are described. Different substituted isatins were used to generate final products that contain pharmacophoric features for RT inhibition, such as the oxoindole and cyclopropylethynyl groups. The suitability of the indolin-2-one ring in the planned compounds in replacement to the benzoxazinone ring of efavirenz was proven, since compound 15 presented a greater activity than efavirenz against HIV-1 replication and was not significantly cytotoxic.