申请人:Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
公开号:US04625042A1
公开(公告)日:1986-11-25
The present invention relates to 3-(4-fluorophenoxy)propionitrile having the formula (I): ##STR1## a process for preparing 3-(4-fluorophenoxy)propionitrile having the formula (I) which comprises reacting 4-fluorophenol and acrylonitrile in the presence of a tertiary amine, a process for preparing 6-fluoro-4-chromanone having the formula (II): ##STR2## which comprises reacting 3-(4-fluorophenoxy)propionitrile having the formula (I) with an acid, and a process for preparing 6-fluoro-4-chromanone having the formula (II) which comprises reacting 4-fluorophenol with acrylonitrile in the presence of a catalyst to give 3-(4-fluorophenoxy)propionitrile having the formula (I), which is then reacted with an acid. 6-Fluoro-4-chromanone is an important intermediate for the synthesis of (S)-2,3-dihydro-6-fluoro-spiro[4H-1-benzopyran-4,4'-imidazolidine]-2',5'di one (USAN: sorbinil).
本发明涉及具有化学式(I)的3-(4-氟苯氧基)丙腈:##STR1##一种制备具有化学式(I)的3-(4-氟苯氧基)丙腈的方法,包括在三级胺的存在下,将4-氟苯酚和丙烯腈反应的步骤,一种制备具有化学式(II)的6-氟-4-色酮的方法:##STR2##包括将具有化学式(I)的3-(4-氟苯氧基)丙腈与酸反应的步骤,以及一种制备具有化学式(II)的6-氟-4-色酮的方法,包括在催化剂的存在下,将4-氟苯酚与丙烯腈反应以得到具有化学式(I)的3-(4-氟苯氧基)丙腈,然后将其与酸反应。6-氟-4-色酮是合成(S)-2,3-二氢-6-氟-螺[4H-1-苯并吡喃-4,4'-咪唑啉]-2',5'二酮(USAN:索比尼尔)的重要中间体。