The Azide-Wittig Reaction.

The introduction of heteroatoms into conjugated organic molecules is an important strategy to tune their reactivity and physical properties. In this realm triazabutadienes (TBDs) of the general from RC=N-N=NR' are an interesting class of compounds, however, general synthetic protocols for their generation are limited. Based on the serendipitous finding that the sterically encumbered azide Mes*N (Mes*=2,4,6-tBuCH) reacted with PMe in the presence of an aromatic aldehyde to form a TBD, we now report on the "Azide-Wittig" reaction.

On the Reactivity of Mes*P(PMe ) towards Aluminum(I) Compounds - Evidence for the Intermediate Formation of Phosphaalumenes.

Phosphaalumenes are the heavier isoelectronic analogs of alkynes and have eluded facile synthesis until recently. We have reported that the combination of a phosphinidene transfer agent, TerP(PMe ) ( Ter=2,6-Ar -C H ), with (Cp*Al) (Cp*=C (CH ) ) afforded the phosphaalumenes TerPAlCp* as isolable, violet, thermally stable compounds. In here we describe attempts to utilize Mes*P(PMe ) (Mes*=2,4,6-tBu -C H ) as a phosphinidene source in combination with different Al(I) precursors, namely NacnacAl ( Nacnac=HC[C(Me)NDip] , Dip=2,6-iPr -C H ), (Cp*Al) and Cp Al (Cp =1,2,4-tBu -C H ).

[The effect of Helicobacter pylori on the development of complications in the stomach and duodenum of patients with rheumatic diseases].

Biopsy material of gastric mucosa obtained from 94 patients with rheumatic diseases was subjected to bacterioscopic, biochemical and microbiological studies. Helicobacter pylori was found in 29% of patients with rheumatism, in 34.3% of patients with rheumatic arthritis and in 39.

[The use of the ultraviolet laser for treating gastroduodenal ulcers].

Results are reported of the use of ultraviolet lasers in the complex treatment of 72 patients with uncomplicated gastroduodenal ulcers. The method proved highly effective in the treatment of this category of patients allowing to reduce significantly the number of treatment sessions, to reduce the hazard of development of complications related to the technique of gastroduodenoscopic examination and to reduce treatment time on the average by 2-3 days.