Spangler LA, Mikolajczyk M, Burdge EL, Kielbasiński P, Smith HC, Lyzwa P, Fisher JD, Omelańczuk J. Synthesis and biological activity of enantiomeric pairs of phosphosulfonate herbicides.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 1999;
47:318-321. [PMID:
10563892 DOI:
10.1021/jf980527j]
[Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The phosphosulfonates are a new class of soil-active herbicides which control a variety of annual grass and broadleaf weeds. Chirality at the phosphorus atom afforded the opportunity to explore stereospecific requirements for herbicidal activity. Chiral (hydroxymethyl)phosphinate intermediates were enzymatically resolved (Pseudomonas fluorescens lipase) from the racemic mixtures and then used to prepare two pairs of enantiomeric phosphosulfonates. Biological testing of the enantiomeric phosphosulfonate herbicides demonstrated that, in each case, the herbicidal activity was attributed to the (+) enantiomer and that the (+) enantiomer is more active than the racemate.
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