Reaktion #486178

Reaktionsgleichung

zinc

methyl 4-(bromomethyl)(1,1'-biphenyl)-2-carboxylate

4-chloro-2-phenyl-quinazoline

→

[[2'-(methoxycarbonyl)(1,1'-biphenyl)-4-yl]-methyl]zinc bromide

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwere added to the solution
2. 2
   ExtraktionThe aqueous phase was extracted with ethyl acetate
3. 3
   Waschenthe organic phase was washed with water and water saturated with sodium chloride
4. 4
   Sonstigedried
5. 5
   Sonstigeevaporated
6. 6
   SonstigeAfter chromatography on silica (eluant:ethyl acetate-hexane 1-9 then 2-8), 260 mg of expected product melting at 120° C. to 121° C. after crystallization from isopropyl ether
7. 7
   Sonstigewere obtained

Vorschrift

[[2'-(methoxycarbonyl)(1,1'-biphenyl)-4-yl]-methyl]zinc bromide was prepared in advance from 400 mg of zinc in 1 ml of tetrahydrofuran and 1.53 g of methyl 4-(bromomethyl)(1,1'-biphenyl)-2-carboxylate (KNOCHEL, J. Org. Chem., 1988, Vo. 53, p. 5789 to 5791) and 240.69 mg of 4-chloro-2-phenyl-quinazoline and 115 mg of palladium tetrakis(triphenyl-phosphine) complex were added to the solution. The mixture stood at 50° C. for 6 hours and the reaction medium was poured into a water/ice/acetic acid mixture. The aqueous phase was extracted with ethyl acetate and the organic phase was washed with water and water saturated with sodium chloride, dried and evaporated. After chromatography on silica (eluant:ethyl acetate-hexane 1-9 then 2-8), 260 mg of expected product melting at 120° C. to 121° C. after crystallization from isopropyl ether were obtained.

Quelle