Treatment of 5- and 7-methoxy-2-methyl-4H-1-benzothiopyran-4-one with lithium diisopropylamide followed by electrophiles gave 2-substituted 4H-1-benzothiopyran-4-ones. Utilizing this reaction, 3-substituted 6- and 8-methoxy-1,2-dihydrocyclopenta[b][1]benzothiopyran-9(3H)-ones were also synthesized, and several compounds showed potential analgesic and anti-inflammatory activities.
用
二异丙基胺锂处理5-和7-甲氧基-
2-甲基-4H-1-苯并噻喃-4-酮,然后与亲电试剂反应,得到2-取代的4H-1-苯并
噻喃-4-酮。利用这种反应,还可以合成3-取代的6-和8-甲氧基-1,2-二氢环戊并[b][1]苯并
噻喃-9(3H)-酮,其中一些化合物显示出潜在的镇痛和抗炎活性。