TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): 6 Methods for preparation of the triazole compound are given e.g. (epoxidation reaction) reacting cyclopentanone compound of formula (XI) with trimethylsulfonium salt such as trimethylsulfonium bromide in presence of metal oxide e.g. sodium oxide and optionally a base e.g. sodium hydride in a two-phase solid/liquid system comprising an organic solvent, e.g. toluene to obtain oxirane compound of formula (XII); reacting oxirane compound (XII) with (1,2,4)-1H-triazole in the presence of a base e.g. sodium hydride in a solvent e.g. toluene to obtain triazole compound (XIII); and sulfurizing the compound (XIII) to obtain triazole compound (IA) (where R4 is H, n is 0 and b is single bond). Preferred Definitions:    b=single bond;    L1 and L4=H, F or CF3;    L2 and L3=H or Cl;    R1 and R2= methyl;    R3=H;    R5=1-4C alkyl, 1-4C alkoxy, phenyl, phenoxy or NR9R10;    R9=H;    R10=H, 1-4C alkyl or phenyl;    R4=H, CN or methyl;    R4a=H, 1-4C-alkyl or 1-4C haloalkyl;and    n=0.    One or two of L1-L4 are not H. One of L1 and L4 is not H and the other one is H. At least one of L2 and L3 is H. Either both of L2 and L3 are H or one is H and the other is Cl.    ACTIVITY - Plant Protectant; Fungicide; Cytostatic; Virucide; Anti-HIV. The curative fugicidal action of 5-(2-Trifluoromethylbenzyl)-1-(5-mercapto-(1,2,4)-triazol-1-ylmethyl)-2,2-dimethylcyclopentanol (I') (test) (300 parts per million) against soybean rust on soybean caused by Phakopsora pachyrhizi was determined. The soybean plant without treatment with (I') was used as control group (untreated group). The extent of the rust development on the leaves was then determined. The % growth for test/control groups was found to be 0/70.    MECHANISM OF ACTION - None given.    ADMINISTRATION - The compounds are applied at rate of 0.001-2 (preferably 0.005-2, especially 0.05-0.9, particularly 0.1-0.75) kg per ha. The compounds are applied to seed at rate of 0.1-1000 g (preferably 1-1000 g, especially 1-100 g, particularly 5-100 g) per 100 kilogram of plant propagation material (preferably seed), by dusting, coating or drenching seed. In the protection of materials, the compounds are applied at rate of 0.001 g to 2 kg (preferably 0.005 g to 1 kg) per cubic meter of treated material. The compounds are administered at a dosage of 10-1000 mg, orally. The compounds are also administered parenterally (including intraperitoneally, intravenously, intramuscularly, subcutaneously or by injection).    SPECIFIC COMPOUNDS - 16660 Compounds are disclosed as triazole compounds e.g. 5-(2-trifluoromethylbenzyl)-1-(5-mercapto-(1,2,4)-triazol-1-ylmethyl)-2,2-dimethylcyclopentanol (I'), 5-(2-fluorobenzyl)-1-(5-mercapto-(1,2,4)-triazol-1-ylmethyl)-2,2-dimethylcyclopentanol, 5-(2-fluoro-3-chlorobenzyl)-1-(5-mercapto-(1,2,4)-triazol-1-ylmethyl)-2,2-dimethylcyclopentanol, 5-(2-methylbenzyl)-1-(5-mercapto-(1,2,4)-triazol-1-ylmethyl)-2,2-dimethylcyclopentanol, 5-(2-isopropylbenzyl)-1-(5-mercapto-(1,2,4)-triazol-1-ylmethyl)-2,2-dimethylcyclopentanol.    EXAMPLE - 5-(1-(2-Trifluoromethylphenyl)-meth-(E)-ylidene)-2,2-dimethylcyclopentanone (11.90 g) was dissolved in tetrahydrofuran (110 ml) and reduced under standard hydrogenation conditions in the presence of Raney nickel (10% mmol) at ambient temperature overnight. The reaction mixture was filtered over Celite and the solids were washed with dichloromethane (100 ml). The filtrate was concentrated under reduced pressure to obtain 5-(2-trifluoromethylbenzyl)-2,2-dimethylcyclopentanone (7.50 g, yield 62%). To sodium hydride (2.33 g) in N-methylpyrrolidinone (35 ml) was slowly added trimethylsulfoxonium iodide (9.16 g). When effervescence ceased, (1,2,4)-1H-triazole (3.83 g) was added portion wise and stirring was continued for an additional 30 minutes. 5-(2-Trifluoromethylbenzyl)-2,2-dimethylcyclopentanone (7.50 g) was added, followed by isopropanol (35 ml) and the mixture was heated to 100 degrees C. Upon completion of the reaction, water was added (100 ml), followed by methyl tert-butyl ether (250 ml) and lithium chloride (1-2 spatulas). After work up, 5-(2-trifluoromethylbenzyl)-2,2-dimethyl-1-(1,2,4)-triazol-1-ylmethyl-cyclopentanol (2.45 g, yield 25%) was obtained. To a solution of 5-(2-trifluoromethylbenzyl)-2,2-dimethyl-1-(1,2,4)-triazol-1-ylmethyl-cyclopentanol (0.50 g) in N-methypyrrolidinone (15 ml) was added elemental sulfur (0.345 g) and the mixture was heated at 180 degrees C overnight. Upon cooling to room temperature, methyl tert-butyl ether (50 ml) was added and the mixture was filtered over a short silica pad. After work up, 5-(2-trifluoromethylbenzyl)-1-(5-mercapto-(1,2,4)-triazol-1-ylmethyl)-2,2-dimethylcyclopentanol (0.16 g, yield 30%) was obtained.