2,3-丁二硫醇 、 2-氯环己酮 以to give 5,6,7,8-tetrahydro-2,3-dimethyl-1,4-benzodithian as a greenish oil, b.p. 90°-100°/0.07 mm的产率得到2,3-Dimethyl-2,3,5,6,7,8-hexahydro-1,4-benzodithiine
Regulation of the growth of plant life, including herbicidal, defoliant or desiccant effects, may be accomplished with certain 2,3-dihydro-1,4-dithiin 1,1,4,4-tetroxides of the formula ##STR1## wherein the R's have various values such as hydrogen, alkyl, etc. Certain of the compounds, such as 2,3-dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4-tetroxide, are new chemicals, and are useful as pre-and post-emergent herbicides, and in harvest aid procedures, such as defoliation/desiccation of various crops, including cotton and potatoes.