An efficient, three-component synthesis and molecular structure of derivatives of 2-amino-3-R-6-ethyl-4,6-dihydropyrano[3,2-c][2,1]benzothiazine-5,5-dioxide spirocombined with a 2-oxindole nucleus
摘要:
Spiro[(2-amino-3-R-6-ethyl-4,6-dihydropyrano[3,2-c][2,1]benzothiazine-5,5-dioxide)-4,3'-(1'-R'-5'-R ''-indolin-2'-one)] compounds were synthesized based on the three-component interaction of benzo[c][2,1]thiazin-4-on 2,2-dioxide with corresponding isatins and appropriate methylene active nitriles in the presence of a base as a catalyst. The molecular structures of the target compounds were proved uniquely by the X-ray diffraction analysis method. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of fused 2′-amino-3′-R-spiro-[indole-3,4′-pyran]-2(1H)-ones
摘要:
An efficient one-pot procedure has been proposed for the synthesis of fused 2'-amino-3'-R-spiro-[indole-3,4'-pyran]-2(1H)-ones via base-catalyzed three-component condensation of isatins with the corresponding nitriles and 1,3-diketones.
Synthesis of new heterocyclic systems—substituted spiro[chromene-4,3′-indoles] and spiro[indole-3,4′-quinolines]
作者:S. A. Pogosyan、Dzh. A. Avakimyan、H. M. Stepanyan
DOI:10.1134/s1070428016090098
日期:2016.9
Methods have been developed for the synthesis of new heterocyclic systems, spiro[chromene-4,3′- indoles] and spiro[indole-3,4′-quinolines] by the base-catalyzed domino reaction of isatins with 5,5-dimethylcyclohexane- 1,3-dione (or 5,5-dimethyl-3-anilinocyclohex-2-en-1-one) and ethyl cyanoacetate.
Engaging thieno[2,3‐b]indole‐2,3‐dione for the efficient synthesis of spiro[indoline‐3,4′‐thiopyrano[2,3‐b]indole] by reaction with
<i>N</i>
‐substituted isatilidenes
作者:Noble V. Thomas、Vidya Sathi、Ani Deepthi、Sruthi Leena、Sidharth Chopra
DOI:10.1002/jhet.4147
日期:2021.1
A simple and efficient method, proceeding through a new mechanistic pathway, for the synthesis of spiro[indoline‐3,4‐thiopyrano[2.3‐b]indole derivatives have been developed by exploiting the reaction of thieno[2,3‐b]indole‐2,3‐dione with N‐substituted isatilidenes. The compounds synthesized have been screened for antibacterial activity. The generality of the reaction and mechanistic rationale are presented
Three-Component Condensation for the Construction of Novel Spirooxindoles
作者:Chun Cai、Fei Ji、Mu Sun、Mei-fang Lv、Wen-bin Yi
DOI:10.1055/s-0032-1316836
日期:——
using a copper azide–alkynecycloaddition (CuAAC) reaction. A new route for the synthesis of novel spirooxindoles from isocyanides, dialkyl acetylenedicarboxylates, and N-substituted isatylidene derivatives through [3+2] cycloaddition has been developed. This method has several advantages, such as high regioselectivity, high yields, readily available starting materials, and one-pot operations. The
Palladium-Catalyzed Bis-Functionalization of Isatylidenes: A Facile Route towards Spiro-Indol-2-ones
作者:Sholly Clair George、Jubi John、Saithalavi Anas、Joshni John、Yoshinori Yamamoto、Eringathodi Suresh、K. V. Radhakrishnan
DOI:10.1002/ejoc.201000604
日期:——
construction of 3,3-disubstituted indol-2-ones from isatylidenes by utilizing amphiphilic bis-π-allylpalladium and related intermediates. The developed strategy is a new method for the quaternization of position 3 of the indol-2-one towards disubstituted functionalized indol-2-ones. These products were subjected to ring-closing metathesis towards the synthesis of spiro[cyclohexene-1,3′-indol]-2′-ones
Construction of highly enantioselective spiro-oxindole derivatives with fused chromene via organocascade catalysis
作者:Prathibha Kumari、Sekhar Nandi、Gaurav Kumar、Noorul H. Khan、Rukhsana I. Kureshy、Sayed H. R. Abdi、E. Suresh、Hari C. Bajaj
DOI:10.1039/c6ra06812j
日期:——
A first highly enantioselective addition of naphthols and sesamol to indolylidene cyanoacetate derived from isatins was carried out in presence of bi-functional quinine thiourea as organocatalyst. Under optimized reaction condition...