Abstract
The reactions of Lawesson's reagent-2.4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide, with long-chain 1 - glycerin rnonoethers, 3-mercapto-4-amino-1,2,4-triazoles, 1,3-disubstituents glycinamides, and 2-methyl-1,3-butadiene have been investigated and found to form cyclic analogues 1, fused heterocycles 2, 5-membered phosphorus rings 3, and 6-membered heterocycle 4, respectively, in moderate yield. The preliminary biological screening tests for these rings showed that they possess significant selective herbicidal activity against rape.