作者:Si‐Qing Wang、Zong‐Ci Liu、Wen‐Jun Yue、Liang Yin
DOI:10.1002/anie.202013207
日期:2021.2.23
major product. In this vinylogous reaction, aromatic, α,β‐unsaturated, and aliphatic aldehydes are competent substrates. Moreover, a variety of azaarenes, such as pyrimidine, pyridine, pyrazine, quinoline, quinoxaline, quinazoline, and benzo[d]imidazole are well‐tolerated. At last, the chiral vinylogous product is demonstrated as a suitable Michael acceptor towards CuI‐catalyzed nucleophilic addition
揭示了烯丙基氮杂芳烃和醛类的乙烯基醇醛缩醛型反应,可提供一系列手性的γ-羟基-α,β-不饱和氮杂芳烃,具有中等至优异的收率,并具有极高的区域和对映选择性。以(R,R P)-TANIAPHOS和(R,R)-QUINOXP *为配体,产物中的碳-碳双键以(E)形式生成。用(- [R)-DTBM-SEGPHOS作为配体,(ž主要产品中形成了碳-碳双键。在这种乙烯基反应中,芳香族,α,β-不饱和醛和脂肪族醛是有效的底物。此外,各种氮杂芳烃,如嘧啶,吡啶,吡嗪,喹啉,喹喔啉,喹唑啉和苯并[d]咪唑均具有良好的耐受性。最后,手性乙烯基产物被证明是有机镁试剂对CuI催化亲核加成反应的合适Michael受体。