C-13-alkylated methoxy-8tf-dibenzo[a,g]quinolizin-8-ones 2a-e were synthesized by photocyclization of 1 -alkylidene-N-benzoyl-1,2,3,4-tetrahydroisoquinolines 1. Moreover, condensation of l,2,3,4-tetrahydro-6,7-dimethoxy-l-oxo-isoquinoline with homophthalic acid anhydrides 7a and b leads to the C-13-alkylated 8-oxoberbines 2b and c and improves the yields compared with those of the photocyclizat...

During the last few years it was observed that anhydrides of carboxylic and phosphoric acids appear as intermediates in metabolism. For one of these, acetyl phosphate, a method of determination had been worked out (I), based on a differential precipitation of calcium acetyl and inorganic phosphate with subsequent phosphate determination in the separate fractions. Such a procedure, founded on a ...

A versatile solid-phase approach to sequence-defined polyamidoamines was developed. Four different Fmoc-polyamino acid building blocks were synthesized by selective protection of symmetrical oligoethylenimine precursors followed by introduction of a carboxylic acid handle using cyclic anhydrides and subsequent Fmoc-protection. The novel Fmoc-polyamino acids were used to construct polyamidoamine...

A family of novel chloramphenicol base-amide organocatalysts possessing a NH functionality at C-1 position as monodentate hydrogen bond donor were developed and evaluated for enantioselective organocatalytic alcoholysis of meso-cyclic anhydrides. These structural diversified organocatalysts were found to induce high enantioselectivity in alcoholysis of anhydrides and was successfully applied to...

Versatile method has been developed for synthesis of N-substituted imides. Thus, acid anhydrides, imides and dicarboxylic acids were successfully subjected to dehydrative cyclization with substituted amines using DPPOx and Et(3)N to afford N-substituted imides under mild conditions. The DNA binding and apoptosis induction were investigated with regard to their potential utility as cytotoxic age...