反应详情

In a 50 ml-round-bottomed flask, 1.20 g (2.64 mM) of N-heptanoyl-N'-(6-decyloxy-2-naphthoyl)-hydrazine, 1.20 g (2.97 mM) of Lawesson's reagent and 15 ml of tetrahydrofuran were placed, followed by refluxing for 45 minutes under stirring. After the reaction, the reaction mixture was poured into a solution of 0.95 g of sodium hydroxide in 100 ml of iced water to precipitate a crystal. The crystal was recovered by filtration, followed by washing with water and purified by silica gel column chromatography (eluent: toluene). The resultant crystal was recrystallized from a mixture solvent (toluene-methanol) two times and further recrystallized from ethyl acetate and from toluene each once to obtain 0.54 g of 2-hexyl-5-(6-decyloxynaphthalene-2-yl)-1,3,4-thiadiazole (Yield: 45.2%). ##STR29##

1. temperatureby refluxing for 45 minutes
2. customAfter the reaction
3. customto precipitate a crystal
4. filtrationThe crystal was recovered by filtration
5. washby washing with water
6. custompurified by silica gel column chromatography (eluent: toluene)
7. customThe resultant crystal was recrystallized from a mixture solvent (toluene-methanol) two times
8. customfurther recrystallized from ethyl acetate and from toluene each once