A method of producing a 4-hydroxycyclopentenone represented by the formula, ##STR1## wherein R.sub.1 is an alkyl, alkenyl, alkynyl, cycloalkyl, thienyl, phenyl, p-methylbenzyl or benzyl group and R.sub.2 is an alkyl, alkenyl or alkynyl group having 6 or less carbon atom, which comprises reacting a furylcarbinol compound of the formula, ##STR2## wherein R.sub.1 is as defined above, in the presence of an acid in a mixed solvent of water and an organic solvent, to obtain a cyclopentenone compound of the formula, ##STR3## wherein R.sub.1 is as defined above; reacting the cyclopentenone compound in the presence of an oxidizing agent to obtain a cyclopentendione compound of the formula, ##STR4## wherein R.sub.1 is as defined above; reacting the cyclopentendione compound with a Grignard reagent of the formula, R.sub.2 MgX wherein R.sub.2 is as defined above and X is chlorine, bromine or iodine atom, to obtain an oxocyclopentene compound of the formula, ##STR5## wherein R.sub.1 and R.sub.2 are as defined above; and reacting the cyclopentenone compound in the presence of a base. The 4-hydroxycyclopentenones are useful intermediates of agricultural chemicals.
一种制备
4-羟基
环戊酮的方法,其
化学式为##STR1##其中R.sub.1为烷基,烯基,炔基,环烷基,
噻吩基,苯基,对甲基苄基或苄基基团,R.sub.2是具有6个或更少碳原子的烷基,烯基或炔基,包括在
水和有机溶剂的混合溶剂中,在酸的存在下反应化合物##STR2##其中R.sub.1如上定义,以获得化合物##STR3##其中R.sub.1如上定义;在氧化剂的存在下反应
环戊酮化合物以获得化合物##STR4##其中R.sub.1如上定义;将
环戊二酮化合物与Grignard试剂反应,其
化学式为R.sub.2MgX,其中R.sub.2如上定义,X为
氯,
溴或
碘原子,以获得氧代
环戊烯化合物,其
化学式为##STR5##其中R.sub.1和R.sub.2如上定义;以及在碱的存在下反应
环戊酮化合物。
4-羟基
环戊酮是农药
化学品的有用中间体。