申请人:ENICHIMICA SECONDARIA S.p.A.
公开号:EP0123357A2
公开(公告)日:1984-10-31
Process for the preparation of 2,3-bihydro-2,2-dimethyl-7-benzofuranol, comprising the reaction between catechol or 4-tert. butyl catechol and isobutyraldehyde in the presence of catalytic amounts of at least one compound selected from the group consisting of the oxides, hydroxides, alcoholates and carboxylates of metals belonging to the Groups IA, IIA, IIB and VIIB of the Periodic System of the Elements and the subsequent reaction of rearrangement of the products which have been obtained, optionally previously removing one or more low-boiling components, in the presence of a compound having acidic properties, of an organic or a mineral nature.
制备 2,3-二氢-2,2-二甲基-7-苯并呋喃酚的工艺,包括邻苯二酚或 4-叔丁基邻苯二酚与异丁醛在至少一种选自元素周期系 IA、IIA、IIB 和 VIIB 族金属的氧化物、氢氧化物、醇酸盐和羧酸盐组成的组中的化合物的催化下进行反应,以及随后在一种有机或矿物性质的具有酸性的化合物存在下,对所得到的产物进行重排反应,可选择事先去除一种或多种低沸点成分。