تفاعل #1687643

معادلة التفاعل

3-(3-chloro-1,2,5-thiadiazol-4-yl)pyridine

potassium carbonate

sodium hydrosulfide monohydrate

potassium carbonate

3-(2-thienyl)-1-chloro-propane

→

3-(3-(3-(2-thienyl)- 1-propylthio)-1,2,5-thiadiazol-4-yl)pyridine

المردود 31.0%

المذيبات

DMF

DMF

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONwere added to the reaction
2. 2
   workup.STIRRINGstirred for 1 h at room temperature
3. 3
   أخرىThe reaction was quenched with water
4. 4
   استخلاصthen extracted with methylene chloride (3 x 75 ml)
5. 5
   تجفيفThe organic phase was dried over NaCl/Na2SO4
6. 6
   أخرىthen evaporated
7. 7
   أخرىThe residue was purified by flash chromatography
8. 8
   غسيلeluting with 1:1 ethyl acetate/hexanes

الإجراء التجريبي

A solution of 3-(3-chloro-1,2,5-thiadiazol-4-yl)pyridine (2.0 g, 10.1 mmol) in DMF (10 ml) was cooled to 5° C. whereupon potassium carbonate (2.8 g, 20.2 mmol) and sodium hydrosulfide monohydrate (1.5 g, 20.2 mmol) were added to the reaction. Stirred for 1 h then potassium carbonate (1.4 g, 10.1 mmol) and a solution of 3-(2-thienyl)-1-chloro-propane (1.8 g, 11.2 mmol) in DMF (5 ml) were added to the reaction and stirred for 1 h at room temperature. The reaction was quenched with water then extracted with methylene chloride (3 x 75 ml). The organic phase was dried over NaCl/Na2SO4 then evaporated. The residue was purified by flash chromatography eluting with 1:1 ethyl acetate/hexanes to yield 1.0 g of 3-(3-(3-(2-thienyl)- 1-propylthio)-1,2,5-thiadiazol-4-yl)pyridine. Quaternization and reduction was done as described in example 9. (Compound 66). M.p. 98°-100° C.

المصدر