Synthesis and properties of optically active nanostructured polymers bearing amino acid moieties by direct polycondensation of 4,4′-thiobis(2- tert-butyl-5-methylphenol) with chiral diacids
Four derivatives of N-trimellitylimido-l-amino acid (4a-4d) were prepared by the reaction of trimellitic anhydride (1) with the l-amino acids (2a-2d) in acetic acid as diacid monomers and were used with the aim to obtain a new family of amino acid based p
Mallakpour, Shadpour,Soltanian, Samaneh
experimental part
p. 2187 - 2194
(2012/08/29)
Pyridine and triphenylphosphine oxide activation of sulfonyl chlorides in the syntheses of (E) alk-1-enyl sulfones
This paper describes efficient and new approaches to (E) alk-1-enyl sulfones, starting from sulfonyl chloride/pyridine or sulfonyl chloride/triphenylphosphine complexes in the presence of (E) di-iso-butyl alk-1-enyl alanes. The use of CuCl in the presence of sulfonyl chloride/pyridine complexes or pyridine in the presence of sulfonyl chloride/triphenylphosphine complexes, respectively, results in a remarkable increase in the yields and conversions.
Signore,Malanga,Menicagli
experimental part
p. 11218 - 11223
(2009/04/11)
Kinetics and mechanism of the pyridinolysis of benzenesulfonyl chlorides in methanol
The kinetics of reactions between Y-benzenesulfonyl chlorides and X-pyridines in methanol at 35.0°C were investigated. Strong para π-acceptors, X = p-CN and p-COCH3, give good linear fits to Bronsted-type plots with low βx (=0.32-0.4
Hong, Sung Wan,Koh, Han Joong,Lee, Ikchoon
p. 425 - 429
(2007/10/03)
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