Cascade One-Pot Synthesis of Indanone-Fused Cyclopentanes from the Reaction of Donor-Acceptor Cyclopropanes and Enynals <i>via</i>
a Sequential Hydrolysis/Knoevenagel Condensation/[3+2] Cycloaddition
作者:Jiantao Zhang、Huanfeng Jiang、Shifa Zhu
DOI:10.1002/adsc.201700345
日期:2017.9.4
to construct indanone‐fused cyclopentanes via a sequential hydrolysis/Knoevenagelcondensation/[3+2] cycloaddition is reported. The desired indanone‐fused cyclopentanes were obtained in good yields. This method features mild reaction conditions and broad substrate scope, which render it very appealing to chemists for the synthesis of complex molecules containing an indanone‐fused cyclopentane moiety
A Straightforward Approach to Tetrahydroindolo[3,2-<i>b</i>]carbazoles and 1-Indolyltetrahydrocarbazoles through [3+3] Cyclodimerization of Indole-Derived Cyclopropanes
作者:Olga A. Ivanova、Ekaterina M. Budynina、Victor N. Khrustalev、Dmitriy A. Skvortsov、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1002/chem.201502287
日期:2016.1.22
A rapid new approach to produce biologically relevant bisindoles, namely indolyltetrahydrocarbazoles and indolo[3,2‐b]carbazoles, has been developed, based on the Ga(OTf)3‐catalyzed [3+3] cyclodimerization of indole‐derived donor–acceptor cyclopropanes. Chemoselectivity of the process depends on the location of the three‐membered ring at the indole core.
基于由吲哚衍生的供体-受体的Ga(OTf)3催化的[3 + 3]环二聚作用,已开发出一种快速的新方法来生产生物学相关的双吲哚,即吲哚基四氢咔唑和吲哚[3,2- b ]咔唑。环丙烷。该过程的化学选择性取决于三元环在吲哚核上的位置。
Ambident reactivity of 5-aminopyrazoles towards donor–acceptor cyclopropanes
作者:Anna E. Vartanova、Irina I. Levina、Nina K. Ratmanova、Ivan A. Andreev、Olga A. Ivanova、Igor V. Trushkov
DOI:10.1039/d2ob01490d
日期:——
Lewis acid-catalysed reactions of donor–acceptor cyclopropanes with 1,3-disubstituted 5-aminopyrazoles were investigated. Under catalysis with gallium(III) chloride, products of the three-membered ring opening via a nucleophilic attack of the exocyclic amino group were obtained in a chemoselective manner. Oppositely, in the presence of scandium(III) triflate, products of either N-alkylation or C(4)-alkylation
研究了供体-受体环丙烷与 1,3-二取代 5-氨基吡唑的路易斯酸催化反应。在氯化镓(III )的催化下,通过环外氨基的亲核攻击以化学选择性方式获得三元环开环产物。相反,在三氟甲磺酸钪( III )的存在下,形成N-烷基化或C (4)-烷基化或两者的混合物的产物。C (4) 烷基化产物一步转化为对药物化学和药理学具有吸引力的四氢吡唑并[3,4- b ] 氮杂卓。