تفاعل #470386

معادلة التفاعل

2,5-dibromo-pyridin

3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-quinoline

K2CO3

THF

→

white solid

المردود 107.4%

3-(5-bromo-pyridin-2-yl)-quinoline

المردود 107.4%

المذيبات

water

toluene

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONwere added
2. 2
   استخلاصthe mixture was subject to extraction
3. 3
   استخلاصThen, an organic layer extracted
4. 4
   أخرىtherefrom was dried
5. 5
   ترشيحfiltered
6. 6
   أخرىA solvent was removed
7. 7
   أخرىthe resultant was separated

الإجراء التجريبي

1.1 g (4.7 mmol) of 2,5-dibromo-pyridin, 1.0 g (3.92 mmol) of 3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-quinoline, 0.45 g of tetrakis(triphenylphosphine)palladium(0), 7.84 ml of 2M K2CO3 and 1.26 g of tetrabutylammoniumbromide were added to a 100 ml round-bottom flask in an argon atmosphere, and 30 ml of THF and 15 ml of toluene were added thereto. Then, the mixture was refluxed at 100° C. for 16 hours. When the mixture solution turned dark brown, water was added thereto and the mixture was subject to extraction using chloroform. Then, an organic layer extracted therefrom was dried using anhydrous magnesium sulfate and filtered. A solvent was removed and the resultant was separated using a silica gel column chromatography to obtain 1.2 g of white solid 3-(5-bromo-pyridin-2-yl)-quinoline which was identified by APCI using LCMS. As a result, a main peak was observed at [M+H]+=285.

المصدر