Representatives Of Derivatives Research Articles

Isolation and Characterization of Lewis Base Stabilized Monomeric Parent Stibanylboranes.

The synthesis of the Lewis base stabilized monomeric parent compound of stibanylboranes, "H2 Sb-BH2 ", is reported. Through a salt metathesis route, the silyl-substituted compounds (Me3 Si)2 Sb-BH2 ⋅LB (LB=NMe3 , NHC(Me) ) were synthesized as representatives of derivatives with a Sb-B σ bond. Under very mild conditions, they could be transformed into the target compounds Me3 N⋅H2 B-HSb-BH2 ⋅NMe3 and H2 Sb-BH2 ⋅NHC(Me) , respectively. The products were characterized by X-ray structure analysis, NMR spectroscopy, IR spectroscopy, and mass spectrometry. DFT calculations give further insight into the stability and bonding of these unique compounds.

Preparation and Structure Investigation of 2,3-Dihydro-1,3-Benzothiazole-3,2-d-1,2,4, 3-Triazaphosphole

Abstract The first representatives of derivatives of title compound were synthesized and their interested structure was investigated.

Alkaloids of Haplophyllum perforatum

The alkaloid composition of the seeds and roots of the plantHaplophyllum perforatum growing in Tadzhikistan (Karateg range) has been studied for the first time. In addition to the known furoquinoline alkaloids, the new alkaloid haplosine has been isolated and it has been shown to be identical with the product of the hydrogenolysis of haplopine. Among natural compounds, this is the first representative of derivatives of the 3-ethyl-4-methoxy-quinolin-2-one series.