The synthesis of highly functionalized spirocarbocyclic oxindoles was accomplished for the first time, using a Hauser annulation strategy. A reaction between methyleneindolinones and arylsulfonylphthalides catalyzed by cesium carbonate gave access to a new class of biologically important spiro[indoline-3,2′-naphthalene] derivatives in very good yields. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Venkitasamy Kesavan

Department Of Biotechnology

Kanduru Lokesh

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

European Journal of Organic Chemistry

3-Alkynyl-3-OBoc oxindoles underwent Cu(II) mediated Friedel-Crafts alkylation with indoles and phenols to yield of structurally diverse 3-alkynyl-3-indole/phenol-oxindole derivatives. The synthetic application of alkylated phenol derivatives were further demonstrated to biologically important new class of chromene fused spirooxindoles through intramolecular metal-free iodocyclization under mild reaction conditions with broad substrate scope in very good yields. © 2018 Elsevier Ltd

Tetrahedron Letters

Efficient synthesis of highly functionalized indole and phenol containing 3,3′-disubstituted oxindoles and chromene fused spirooxindoles

Palladium(ii)-catalyzed C3-allylation of 3-ethynyl-3-OBoc oxindole derivatives was achieved for the first time to access highly functionalized 3-allyl-3-ethynyl substituted oxindole derivatives for a broad range of substrates in very good yields (up to 94%). The synthetic applications of the allylated products were explored by synthesizing five and six membered carbocyclic spirooxindoles in moderate to very good diastereoselectivities. © The Royal Society of Chemistry.

Fulltext

RSC Advances

Assembly of 3-allyl-3-ethynyl-oxindole motifs via palladium(ii)-catalyzed quaternary allylation of 3-ethynyl-3-OBoc-oxindoles

3-Allyl-3-hydroxyoxindoles were synthesized in very good enantio- (up to 97% ee) and diastereoselectivities (dr up to 7.6:1) with contiguous quaternary and tertiary stereogenic centers by employing tartrate derived bi(oxazoline) in Pd-catalyzed allylation of 3-OBoc-oxindole. Synthetic utility of 3-allyl-3-hydroxyoxindole was demonstrated by synthesizing a highly substituted spiro(oxindole-3,2′-tetrahydrofuran) derivative in good yield and stereoselectivity. © 2015 American Chemical Society.

Organic Letters

Palladium catalyzed asymmetric allylation of 3-OBoc-Oxindoles: An efficient synthesis of 3-Allyl-3-hydroxyoxindoles

SpringerPlus

Ammonium chloride catalyzed synthesis of novel Schiff bases from spiro[indoline-3,4′-pyran]-3′-carbonitriles and evaluation of their antimicrobial and anti-breast cancer activities

Journal	Data powered by TypesetEuropean Journal of Organic Chemistry
Publisher	Data powered by TypesetWiley-VCH Verlag
ISSN	1434193X
Open Access	No