STUDIES ON ORGANOPHOSPHORUS HETERO-CYCLES PART IV. THE REACTION OF LAWESSON'S REAGENT WITH GLYCINAMIDES, SYNTHESIS AND HERBICIDAL ACTIVITY OF 1,3,2-DIAZAPHOS-PHOLIDIN-4-THIONE-2-SULFIDES

Abstract

2,4-Bis (4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide (Lawesson's Reagent) reacts with glycinamides (2a-m) in benzene at 55 ∼ 60°C to give 1,3,2-diazaphospholidin-4-thone-2-sulfides (3a-m). The structure of the products has been confirmed by elementary analyses, NMR, IR, MS and X-ray diffraction. The result of preliminary bioassay indicates that some of the compounds prepared have high selective herbicidal activity against rap.

Key Words:

• 1,3,2-Diazaphospholidin-4-thione-2-sulfide
• Lawesson's reagent
• Glycinamide
• Synthesis
• herbicidal activity