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1. 发明授权

US4562266A Process for the preparation of 2,3-dihydro-2,2-dimethyl-7-benzofuranol 失效
标题翻译： 2,3-二氢-2,2-二甲基-7-苯并呋喃醇的制备方法
公开(公告)号：US4562266A
公开(公告)日：1985-12-31
申请号：US602214
申请日：1984-04-19
申请人： Carlo Neri , Villiam Giroldini , Mario Traversoni , Guido Guizzi , Emilio Perrotti , Antonio Rinaldi
发明人： Carlo Neri , Villiam Giroldini , Mario Traversoni , Guido Guizzi , Emilio Perrotti , Antonio Rinaldi
IPC分类号： C07D307/79 , C07C37/20 , C07D307/86
CPC分类号： C07C37/20 , C07C37/52 , C07D307/86
摘要： Process for the preparation of 2,3-dihydro-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. The product is useful in the synthesis of pesticides.
摘要翻译：制备2,3-二氢-2,2-二甲基-7-苯并呋喃醇的方法，包括在催化量的至少一种选自下组的化合物的存在下，在儿茶酚或4-叔丁基邻苯二酚与异丁醛之间的反应由属于元素周期系统的IA，IIA，IIB和VIIB族的金属的氧化物，氢氧化物，醇化物和羧酸盐组成，以及随后的已经获得的产物的重排反应，任选地预先除去一个或多个在具有酸性的化合物的存在下，有机或矿物性质的低沸点成分。该产品可用于合成农药。

2. 发明授权

US4564691A Process for preparing substituted 2,3-dihydrobenzofuran 失效
标题翻译：取代2,3-二氢苯并呋喃的制备方法
公开(公告)号：US4564691A
公开(公告)日：1986-01-14
申请号：US602215
申请日：1984-04-19
申请人： Carlo Neri , Villiam Giroldini , Antonio Rinaldi , Mario Traversoni , Mario Clerici
发明人： Carlo Neri , Villiam Giroldini , Antonio Rinaldi , Mario Traversoni , Mario Clerici
IPC分类号： C07D307/72 , C07C37/20 , C07C39/15 , C07C39/16 , C07C39/367 , C07D307/79 , C07D307/86
CPC分类号： C07D307/79 , C07C37/20 , C07C39/16 , C07D307/86
摘要： A process is provided for preparing a substituted 2,3-dihydrobenzofuran of the general formula ##STR1## in which R.sub.a is hydrogen, halogen, alkyl, straight or branched having from 1 to 4 carbon atoms, aryl, alkaryl, --OH, --OR.sub.3, --N(R.sub.d).sub.2, where R.sub.3 and R.sub.d are alkyl, straight or branched having from 1 to 4 carbon atoms; R.sub.b is alkyl, straight or branched, having from 1 to 6 carbon atoms, aryl, alkaryl; and R.sub.c is hydrogen or the same as R.sub.b, by the rearrangement of a 1,1-bis(2-hydroxybenzene) alkyl and/or aryl-ethane, in the presence of catalytic amounts of a mineral acid or organic acid such as phosphoric, sulfuric or p-toluenesulfonic, at elevated temperatures from 180.degree. to 250.degree. C., and withdrawing the resulting products from the reaction mixture as they are formed. The starting 1,1-bis(2-hydroxybenzene) alkyl and/or aryl-ethane compounds may be obtained by the catalyzed reaction of a substituted biphenol with an aldehyde. The substituted 2,3-dihydrobenzofurans are useful in the manufacture of pesticides.
摘要翻译：提供了制备通式为“IMAGE”的取代2,3-二氢苯并呋喃的方法，其中Ra为氢，卤素，具有1-4个碳原子的直链或支链的烷基，芳基，烷芳基，-OH，-OR3 ，-N（Rd）2，其中R3和Rd是具有1至4个碳原子的直链或支链烷基; Rb是具有1-6个碳原子的直链或支链烷基，芳基，烷芳基; 和Rc是氢或与Rb相同，通过在催化量的无机酸或有机酸如磷酸的存在下重新配置1,1-双（2-羟基苯）烷基和/或芳基 - 乙烷，硫酸或对甲苯磺酸，在180℃至250℃的升高温度下，在反应混合物形成时从所得反应混合物中取出。起始的1,1-双（2-羟基苯）烷基和/或芳基 - 乙烷化合物可以通过取代的联苯酚与醛的催化反应获得。取代的2,3-二氢苯并呋喃可用于制造农药。

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