Govindarajan Sundararajan

Babu Varghese

AMINOALCOHOL

aniline derivative

COBALT CHLORIDE

epoxide

polycyclic aromatic hydrocarbon derivative

article

catalysis

catalyst

chemical reaction

reaction analysis

Ring opening

stereochemistry

synthesis

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

Tetrahedron Letters

A series of titanium-based non-metallocene precatalysts [2-(2,6-dialkylphenylamino)-1-phenylethoxy TiCl2 were prepared by reacting lithium salts of the corresponding amino alcohols with TiCl4(THF)2. Upon activation with methylaluminoxane (MAO), these precatalysts polymerized 1-hexene in isotactic manner. The catalyst activity and polymer properties depended on the steric features in the ortho positions of the aniline moiety of the ligands. As the bulkiness of the alkyl group in ortho positions of the aniline moiety increased, the catalyst showed better activity with high molecular weight and greater tacticity control. For 1-hexene polymerization, precatalyst 1ATiCl2 showed activity of 3.05 kg of PH/mol-Ti.h at room temperature and the resulting polyhexene had molecular weight of 403,600 (Mw/Mn=1.40) with 80% isotacticity (mmmm). The dibenzylic titanium complexes 1ATi(CH2Ph)2 and 3ATi(CH2Ph)2, upon activation with MAO or Ph3CB(C6F5)4, showed relatively lower activities towards 1-hexene polymerization, yielding polymers of lower molecular weights but with narrow molecular weight distribution. © 2006 Elsevier Ltd. All rights reserved.

Polymer

Titanium precatalysts bearing N-substituted β-amino alcohols for 1-hexene polymerization: The effect of steric crowding

Synthetic Communications

Zirconium (IV) Chloride Catalyzed Ring Opening of Epoxides with Aromatic Amines

Chemistry Letters

Bi(OTf)3- and Bi(TFA)3-Catalyzed Ring Opening of Epoxides with Anilines under Microwave Irradiation

[Bmim]BF4 ionic liquid: a novel reaction medium for the synthesis of β-amino alcohols

Synthesis

Diisopropoxyaluminium Trifluoroacetate: A New Promoter for Aminolysis of Epoxides

TaCl5-Catalyzed Cleavage of Epoxides with Aromatic Amines

Synthesis of β-amino alcohols by regioselective ring opening of arylepoxides with anilines catalyzed by cobaltous chloride

Journal	Tetrahedron Letters
ISSN	00404039
Open Access	No