Organocatalytic Asymmetric Synthesis of Spiro-Bridged and Spiro-Fused Heterocyclic Compounds Containing Chromane, Indole, and Oxindole Moieties
作者:Zhi-Hao You、Ying-Han Chen、Yu Tang、Yan-Kai Liu
DOI:10.1021/acs.orglett.8b02731
日期:2018.11.2
applied to the asymmetric synthesis of spiro-bridged and spiro-fused heterocyclic compounds, which combined chromane, indole, and oxindole, three potential pharmacophores, in one molecule. The power of these two organocatalytic pathways is underscored by mild reaction conditions and high efficiency in the production of synthetically challenging, but biologically important heterocyclic products, which could
Catalytic Asymmetric Conjugate Addition/Oxidative Dearomatization Towards Multifunctional Spirocyclic Compounds
作者:Alena Rudolph、Pieter H. Bos、Auke Meetsma、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1002/anie.201102069
日期:2011.6.20
Naphthol compounds bearing a pendant α,β‐unsaturated ester undergo a copper(I)‐catalyzed asymmetric conjugate addition/copper(II)‐mediatedintramolecularoxidativecoupling to afford benzofused spirocyclic cyclohexenones (see scheme). This one‐pot strategy results in two new carbon–carbon bonds and three contiguous stereocenters. The products contain a high degree of functionality and molecular complexity
Methods for Labeling a Substrate Using a Hetero-Diels-Alder Reaction
申请人:Popik Vladimir V.
公开号:US20110257047A1
公开(公告)日:2011-10-20
Methods for labeling a substrate using a hetero-Diels-Alder reaction are disclosed. The hetero-Diels-Alder reaction includes the reaction of an o-quinone methide (e.g., an o-naphthoquinone methide) with a polarized olefin to form a hetero-Diels-Alder adduct. The o-quinone methide or the polarized olefin can be attached to a surface of a substrate, and the other of the o-quinone methide or the polarized olefin can include a detectable label. The o-quinone methide can conveniently be generated by irradiation of a precursor compound, preferably in an aqueous solution, suspension, or dispersion.
synthesis of polycyclic compounds which contained both chromane and spirooxindole moieties. In the reaction, regardless of the competitive pathways resulting from multireactive sites of starting materials, products could be obtained in good yields (up to 84%) and with excellent enantioselectivities (most 98 to >99% ee) under the catalysis of a chiral bifunctional thiourea-tertiary amine (1–5 mol %)