A new methodology was developed for the synthesis of enantiomerically enriched 3,3-disubstituted 3-chlorooxindoles 3 via a Michael addition of 3-chloroxindoles to nitroolefins 2, catalyzed by chiral squaramide 10. Products with adjacent quaternary–tertiary centers were isolated in excellent yields (up to 99%), high diastereoselectivities (up to 11:1), and enantiomeric purities (up to 92%). This is
申请人:Soonchunhyang University Industry Academy Cooperation Foundation 순천향대학교 산학협력단(220040359422) BRN ▼312-82-10071
公开号:KR101510245B1
公开(公告)日:2015-04-08
키랄 클로로옥시인돌 유도체의 제조방법이 개시되어 있다. 본 발명은, 키랄 유기 촉매 존재 하에서, (E)-2-아릴나이트로에텐 ((E)-2-arylnitroethene)유도체와 3-클로로인돌린-2-온(3-chloroindoline-2-one) 유도체를 반응시키는 것을 특징으로 한다.