An efficient enantioselective synthesis of cyclic α-aminophosphonates via multicomponent reactions of 2-alkynylbenzaldehydes, amines, and dimethylphosphonate has been developed with the use of a chiral silver spirocyclic phosphate as the catalyst. This protocol provides straightforward access to a series of chiral C1-phosphonylated 1,2-dihydroisoquinoline derivatives with high yields (up to 99%) and
A silver-catalyzed stereoselective domino cycloisomerization–vinylogous aldol reaction of <i>ortho</i>-alkynylbenzaldehydes with 3-alkylidene oxindoles: an entry to functionalized isochromenes
作者:Krishna Kumar、Bhuvnesh Singh、Ravi P. Singh
DOI:10.1039/d0cc06273a
日期:——
An AgBF4-catalyzed domino cycloisomerization–vinylogous aldol addition sequence on a multifunctional substrate such as ortho-alkynylbenzaldehydes yielding functionalized 1H-isochromenes in a single step in high yield and excellent diastereoselectivity (>19 : 1) is described.
Tuning the reactivity of Au-complexes in an Au(i)/chiral Brønsted acid cooperative catalytic system: an approach to optically active fused 1,2-dihydroisoquinolines
作者:Nitin T. Patil、Anil Kumar Mutyala、Ashok Konala、Ramesh Babu Tella
DOI:10.1039/c2cc17450b
日期:——
An enantioselective cooperative catalysis protocol, utilizing achiral Au(I) complexes and chiral Brønsted acids, has been developed for the synthesis of optically pure fused 1,2-dihydroisoquinolines starting from 2-alkynylbenzaldehydes and 2-aminobenzamides.
Gold-Catalyzed Reactions of Enynals with Alkenes for Synthesis Binaphthyl Derivatives
作者:Jun-Jie Hao、Juan Wu、Tao Jiang、Hejiang Luo、Rong-Tao Li
DOI:10.1021/acs.joc.4c00036
日期:——
A PPh3Au[B(C6F5)4]-catalyzed reaction of enynals and alkenes for the construction of binaphthyl derivatives was described. This transformation was achieved through o-Quinodimethane (o-QDM) intermediate’s extended conjugated addition process. The reaction has the advantages of wide substrate scopes, mild reaction conditions, high efficiency, and good scalability.
描述了用于构建联萘衍生物的PPh 3 Au[B(C 6 F 5 ) 4 ]催化的烯醛和烯烃反应。这种转化是通过邻喹啉二甲烷 ( o -QDM) 中间体的扩展共轭加成过程实现的。该反应具有底物范围广、反应条件温和、效率高、可扩展性好等优点。
Hsu, Yu-Chia; Ting, Chun-Ming; Liu, Rai-Shung, Journal of the American Chemical Society, 2009, vol. 131, p. 2090 - 2091