N-phenylamide and N-pyridylamide derivatives, method of preparing them and pharmaceutical compositions containing them
申请人:Merck Patent GmbH
公开号:US06339097B1
公开(公告)日:2002-01-15
The present invention relates to the compounds of formula (I) in which X, R1, R2 and R3 are as defined in claim 1. These compounds are cholesteryl acyl transferase (ACAT) inhibitors.
cycloadduct 4hA with a variety of bases affords the spirocyclopentene derivative 7 and the spiro-1,2-dioxolane derivative 8. A mechanism involving a biradical intermediate is discussed for the formation of the above products 7 and 8 on the basis of chemical evidence. Reduction of the cycloadduct 4hA with sodium borohydride or sodium cyanoborohydride is also described.
1-苯并硫代吡啶鎓盐2与共轭二烯的极性环加成反应在区域和立体上特异性地进行,从而以良好的产率得到相应的苯并稠合的双环sulf盐4。环加合物4与亲核试剂如甲醇或水的反应导致开环,分别得到2-(丁-2-烯基)-和2-(丁-3-烯基)-取代的2 H -1-苯并噻喃5和6。 。用多种碱处理环加合物4hA,得到螺环戊烯衍生物7和螺-1,2-二氧戊环衍生物8。讨论了涉及双自由基中间体的机理,用于基于化学方法形成上述产物7和8。证据。还描述了用硼氢化钠或氰基硼氢化钠还原环加合物4hA。
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