An improved synthesis of 2,2-disubstituted-1,2-dihydroquinolines and their conversion to 3-chloro-2,2-disubstituted-tetrahydroquinolines
摘要:
N-(1,1-disubstitutedpropargyl)anilines can be cyclised to 2,2-disubstituted-12-dihydroquinolines by refluxing them in toluene containing cuprous chloride. Electron donating groups in the para position of the ring enhance the reaction rare and electron withdrawing groups markedly decrease the rare. The derived N-acetyldihydroquinolines can be cis dichlorinated and selectively monodechlorinated at the benzylic position to produce 3-chlorotetrahydroquinolines.
Novel indane and quinoline derivatives, useful, for example, as antiischemic agents, having the formula
where A, X, R₁-R₇ are as defined herein, are disclosed.
Indanes, benzopyrans and analogues thereof are potassium channel inhibitors and blockers of IKur and have the structure
1
where A, B, D, Q, X
1
, R, R
1
, X
2
and R
2
are as defined herein. These compounds are useful as antiarrhythmic agents. In addition, a method is provided for preventing cardiac arrhythmia employing the above compounds.