Syntheses, silylation, characterization, and antimicrobial and antifertility activities of organoboron derivatives of some bioactive monofunctional bidentate semicarbazones

Some new mononuclear organoboron derivatives of the type PhBL 1–5 (OH) ( 1a – 1e ) were synthesized by the reaction of PhB(OH) 2 and LH (LH = OC(NH 2 )NH:NC(CH 3 ) 4 C 6 H 4 R, where R = H (L 1 H); CH 3 (L 2 H); OCH 3 (L 3 H); Cl (L 4 H); Br (L 5 H)) in 1:1 molar ratio in refluxing tetrahydrofuran (THF). This was followed by the reactions of PhBL 1–5 (OH) with NH(SiMe 3 ) 2 in 2:1 molar ratio in THF to yield new heterodinuclear derivatives of …