申请人:Ikemoto Tomomi
公开号:US20080009539A1
公开(公告)日:2008-01-10
A process for the production of an aromatic azo compound having a 2,3-dihydrobenzofuran ring bearing a diazo group at the 5-position of the ring by conducting the diazo coupling of a 2,3-dihydrobenzofuran derivative represented by the general formula (II):
[wherein R
1
and R
2
are each independently C
1-6
alkyl; R
3
is optionally substituted aryl; and R
4
, R
5
and R
6
are each independently hydrogen, C
1-6
alkyl, halogeno, C
1-6
alkoxy, or C
1-6
alkylthio] with a benzenediazonium salt having an electron-withdrawing group at the p- and/or o-position in a mixed solvent composed of water and a polar organic solvent.
一种制备含有2,3-二氢苯并呋喃环,在环上的5位带有重氮基团的芳香偶氮化合物的方法,通过在由水和极性有机溶剂组成的混合溶剂中,将通式(II)所代表的2,3-二氢苯并呋喃衍生物[其中R1和R2各自独立地是C1-6烷基;R3是可选的取代芳基;R4、R5和R6各自独立地是氢、C1-6烷基、卤素、C1-6烷氧基或C1-6烷硫基]与在p-位和/或o-位具有电子吸引基团的苯基重氮盐进行重氮偶联反应。