申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0177080A1
公开(公告)日:1986-04-09
The invention provides a process for preparing a 4-hydroxycoumarin derivative having anti-coagulant properties, useful as a rodenticide, of formula
wherein R' and R2 are independently selected from the group consisting of hydrogen, halogen, alkyl of up to 6 carbon atoms and alkoxy of up to 6 carbon atoms, and R3 represents a group selected from
where X represents a halogen atom or a group C1 12 alkyl, C1 12 alkoxy, C3-8 cycloalkyl, CN, SO2R5, CF3, OCF3, COOR5 or COR5, where R5 is C1-6 alkyl, n' is 0, 1 or 2 and Y is a fluorine or chlorine atom;
where n' and Y are as defined above, X is as defined above or is hydrogen, n" is 0 or 1 and D is an oxygen atom or a group -O-(CH2)m-, -(CH2)m-O-, -O-(CH2)m-O-, -(CH2)m -O-(CH2)p-, -(CH2)-m, or -CH=CH-, or a sulphur analogue thereof, wherein m is in the range 1 to 6 and p is in the range 1 to 6;
where X, n' and Y are as defined in (a) above (d) a group selected from
and
and (e) a group selected from
where X and n" are as defined in (b) above, A is an oxygen or sulphur atom and D' is an oxygen atom or a -CH2- group, which process comprises condensing 4-hydroxycoumarin with a compound of formula
or the corresponding 1,2-dihydronaphthalene, wherein R', R2 and R3 are as defined above, and L is a hydroxy group or a halogen atom, in the presence of an organic solvent and a catalyst characterised in that the solvent is selected from formic acid, a mixture of formic acid and at least one C2-6 aliphatic acid having a boiling temperature at atmospheric pressure in the range 60°C to 105°C and a liquid halogenated hydrocarbon having a boiling temperature of at least 60°C. and reaction is effected at a temperature in the range 60'C to the reflux temperature of the reaction mixture.
本发明提供了一种具有抗凝血特性的 4-羟基香豆素衍生物的制备方法,可用作杀鼠剂,其式为
其中 R'和 R2 独立地选自氢、卤素、最多 6 个碳原子的烷基和最多 6 个碳原子的烷氧基组成的组,R3 代表选自以下的基团
其中 X 代表卤素原子或基团 C1 12 烷基、C1 12 烷氧基、C3-8 环烷基、CN、SO2R5、CF3、OCF3、COOR5 或 COR5,其中 R5 为 C1-6 烷基,n'为 0、1 或 2,Y 为氟或氯原子;
其中 n'和 Y 如上定义,X 如上定义或为氢,n "为 0 或 1,D 为氧原子或基团 -O-(CH2)m-、-(CH2)m-O-、-O-(CH2)m-O-、-(CH2)m -O-(CH2)p-、-(CH2)-m 或 -CH=CH-,或其硫类似物,其中 m 在 1-6 范围内,p 在 1-6 范围内;
其中 X、n'和 Y 如上文(a)中定义 (d) 选自以下的基团
和
和 (e) 选自以下各项的基团
其中 X 和 n "如上文(b)所定义,A 是氧原子或硫原子,D'是氧原子或-CH2-基团,该工艺包括将 4-羟基香豆素与式化合物缩合
或相应的 1,2-二氢萘,其中 R'、R2 和 R3 如上定义,L 为羟基或卤素原子,在有机溶剂和催化剂存在下进行缩合,其特征在于溶剂选自甲酸、甲酸与至少一种 C2-6 脂肪酸的混合物(在大气压下沸点在 60°C 至 105°C 之间)以及沸点至少为 60°C 的液态卤代烃。反应在 60'C 至反应混合物回流温度范围内进行。