反应详情

To a suspension of 1.74 g of potassium 6-hydroxyhexanoate (prepared from e-caprolactone) in 35 cc of sulfolaneat 60° C. was added 0.64 g of sodium hydride (55 % w/w dispersion in mineral oil). The mixture was stirred for 30 minutes to 140° C. until effervescence had stopped. 3 g of 2-chloro-4-phenyl-quinazoline were then added and the resultant mixture was heated for further 2 hours to 140° C. The mixture was poured into 500 cc of water, neutralized with acetic acid and extracted with dichloromethane (3#300 cc). The combined extracts were washed with water, dried (Na2SO4) and evaporated. The residue was chromatographed on silica gel (50-200 mm; eluent: 95:5 diethyl ether/methanol), then washed with n-hexane and filtered to give 0.4 g (10%) of 6-(4-phenyl-2-quinazolinyloxy)hexanoic acid as a whitish solid. (m.p.=112°-114° C.)

1. extractionextracted with dichloromethane (3#300 cc)
2. washThe combined extracts were washed with water
3. dry with materialdried (Na2SO4)
4. customevaporated
5. customThe residue was chromatographed on silica gel (50-200 mm; eluent: 95:5 diethyl ether/methanol)
6. washwashed with n-hexane
7. filtrationfiltered