甲酰基-1,4-苯醌,1,4-苯醌基乙醛,3-(1,4-苯醌基)丙醛,2-(1,4-苯醌基)-2-甲基丙醛和2-甲基-2-(1)的制备描述了(4-萘醌-2-基)丙醛。用可见光照射这些苯醌在苯中的溶液导致将2,5-二羟基苯甲酸从甲酰基-1,4-苯醌中分离出来,并形成5-羟基香豆素-2-酮和3,4-二氢-接下来的两个醌中的6-羟基香豆素;该系列中的最后两个醌失去甲醛元素,分别生成5-羟基-3-甲基苯并呋喃和5-羟基-3-甲基萘-[1,2- b ]呋喃。没有任何辐射进行得很干净。
2-Oxy and 2-thio-2,3-dihydrobenzofuranyl-5-aminosulfonates
申请人:BASF Aktiengesellschaft
公开号:US03946048A1
公开(公告)日:1976-03-23
New and valuable 5-benzofuranyl esters having a good herbicidal action; herbicides containing these compounds as active ingredients; and a process for controlling the growth of unwanted plants with these compounds.
New and valuable 4-benzofuranyl esters having a good herbicidal action, herbicides containing these compounds as active ingredients, a process for controlling the growth of unwanted plants with these compounds, and a process for their manufacture.
2,3-Dihydro-3,3-dimethyl-5-trifluoromethanesulfonyloxybenzofurans, process for producing them and herbicides containing them
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0379174A2
公开(公告)日:1990-07-25
Disclosed are novel 2,3-dihydro-3,3-dimethyl-5-trifluoromethanesulfonyloxy benzofurans and herbicides containing them, which are produced, e.g., via the mono-substituted 2-morpholino derivative, by reacting a corresponding 5-hydroxy benzofuran with a trifluoromethanesulfonyl esterifying agent.