反应详情

To a mixture of 3-(5-methyl-2-phenyl-4-thiazolylmethoxy)-5-isoxazolylmethanol (0.80 g), methyl 2-(2-hydroxyphenyl)acetate (0.45 g), tributylphosphine (1.05 g) and tetrahydrofuran (100 mL) was added 1,1′-(azodicarbonyl)dipiperidine (1.31 g) at room temperature and the mixture was stirred for 3 days. The precipitated crystals were filtered off. The filtrate was concentrated and the residue was subjected to silica gel column chromatography to give crystals (0.55 g, 47%) of methyl 2-[2-[[3-[(5-methyl-2-phenyl-4-thiazolyl)methoxy]-5-isoxazolyl]methoxy]phenyl]acetate from a fraction eluted with ethyl acetate-hexane (1:3, v/v). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 108-109° C.

1. filtrationThe precipitated crystals were filtered off
2. concentrationThe filtrate was concentrated