申请人:——
公开号:US20030096996A1
公开(公告)日:2003-05-22
A process for producing an organotitanium compound capable of regioselectively converting a substituted acetylene compound into polysubstituted benzene or polysubstituted pyridine. The process comprises reacting an acetylene compound represented by the formula (1)
1
[where R
1
and R
2
denote a C
1-20
alkyl group or the like] in the presence of a prescribed titanium compound and a Grignard reagent with a compound represented by the formula (4)
2
[where R
3
and R
4
denote a hydrogen atom or the like] and further reacting with a compound represented by the formula (5)
3
[where R
5
denotes a hydrogen atom or the like, Z denotes CR′ (where R′ denotes a hydrogen atom or the like), nitrogen atom, X
6
denotes a halogen atom or the like, and m is 0 or 1]
thereby giving the titanium compound represented by the formula (6) and/or (7).
4
[where R
1
˜R
5
, Z, X
6
, and m are defined as above; and X
p
and X
q
denote any of X
1
˜X
4
].
一种生产有机钛化合物的工艺,该有机钛化合物能够将取代的乙炔化合物选择性地转化为多取代苯或多取代吡啶。该工艺包括使式(1)代表的炔化合物反应
1
其中 R
1
和 R
2
表示一个 C
1-20
烷基或类似物] 在规定的钛化合物和格氏试剂存在下,用式 (4) 代表的化合物
2
其中 R
3
和 R
4
表示氢原子或类似物]并与式 (5) 所代表的化合物进一步反应
3
其中 R
5
表示氢原子或类似物,Z 表示 CR′(其中 R′表示氢原子或类似物)、氮原子、X
6
表示卤素原子或类似原子,m 为 0 或 1]
从而得到式 (6) 和/或 (7) 所代表的钛化合物。
4
其中 R
1
˜R
5
,Z,X
6
和 m 的定义同上;X
p
和 X
q
表示 X
1
˜X
4
].