Synthesis and Auxinic Behavior of 3-Ethyl-2-isopropyl-3,5-dimethyl-1,4,2-diazaphosphorine 2-Oxide
Eugenia
Făgădar-Cosma,a* Gheorghe Făgădar-Cosma,b
and Maria Laichicic
a
Institute
of Chemistry Timișoara of Romanian Academy, M.
Viteazul Ave, No. 24, 300223-Timisoara, Romania, E-mail: efagadar@yahoo.com
b Politehnica
University, Chemistry Department, T. Lalescu Street, No. 2, 300223-Timisoara,
Romania.
c Ministry of
Agriculture, Forests and Rural Development, DADR -
Timiș County Department, Libertății Square, No. 1, Timișoara, Romania.
Abstract
Alkyldiclorophosphines,
as strong reducing agents, react with ketones in
concentrated hydrochloric acid solution, to give the oxygen transfer products,
which can be used for
preparing cyclic
compounds. In this respect, the synthesis and
characterization of a new heterocyclic compound,
3-ethyl-2-isopropyl-3,5-dimethyl-1,4,2-diazaphosphorine 2-oxide (4), by a
multi-component reaction, was realized. The new obtained compound was
characterized by elemental analysis, MS, GC, IR and 1H-NMR and it
was subjected to biological tests on wheat by using
different concentrations of the tested substance. The biometric measurements
were judged in correlation with chlorophyll a and b development, so that the
entire health of the plants can be monitored. The corroborated results showed
that the compound has a very significantly stimulation effect on wheat, at the
concentration of 50 ppm.
Key words: auxinic activity, phosphorus heterocycle, i-propyldichlorophosphine, chlorophyll a and b content, UV-vis spectrophotometry