Abstract: The invention relates to cyclic imino compounds which have, inter alia, valuable pharmacological properties, especially inhibitory effects on cell aggregation, pharmaceutical compositions which contain these compounds and processes for preparing them.

Abstract: Disclosed are novel pyridodiazepines. These compounds, as well certain known 6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepin-5-ones are useful in the treatment of AIDS, ARC and related disorders associated with HIV infection.

Abstract: A process for preparing nevirapine which comprises reacting 2-chloro-N-(2-chloro-4-methyl-3-pyridyl)-3-pyridine carboxamide with cyclopropylamine followed by cyclisation of the product, wherein the reaction with cyclopropylamine is carried out in the presence of an oxide or hydroxide of an element of the second main or sub-group of the periodic table of elements.

Abstract: Peptide derivatives are of the formula A--B--D--NHCH{CH.sub.2 C(O)R.sup.1 }C(O)--NHCH{CR.sup.2 (R.sup.3)--COOH}C(O)--E wherein A is a lower alkanoyl bearing two substituents, each substituent selected independently from phenyl or a monosubstituted phenyl wherein the monosubstituent is alkyl, halo, hydroxy or alkoxy; B is a N-methyl amino acid residue; D is an amino acid residue; R.sup.1 is alkyl, cycloalkyl, a monosubstituted amino or a disubstituted amino; R.sup.2 is hydrogen or alkyl and R.sup.3 is alkyl, or R.sup.2 and R.sup.3 are joined to form a cycloalkyl; and E is a terminal unit, for example, an alkylamino or a monovalent amino acid radical such as NHCH(alkyl)C(O)OH. The derivatives are useful for treating herpes infections.