Heating the 6-allyloxyindoles (3), readily prepared from the benzaldehydes (1), gives the corresponding 7-allylindoles (4) by regioselective Claisen rearrangement; the 7-linalylindole (10) is prepared from 4-geranyloxybenzaldehyde by a similar sequence.
加热 6-烯丙氧基吲哚 (3),很容易从苯甲醛 (1) 中制备出相应的 7-烯丙氧基吲哚 (4)。
Quinoline derivatives and their use as anti-asthmatic agents
申请人:Fisons plc
公开号:US04698345A1
公开(公告)日:1987-10-06
There are provided benzopyrans of formula I, ##STR1## wherein the substituents, R.sub.5 -R.sub.8 and EA are as defined in the specification. These compounds are useful as anti-asthmatic agents.