β-Alkylation of amino-furan and -thiophene heterocycles is described through metal-, acid- and base-free carbon–carbon bond formation. The ability of both heterocycles to undergo selective β-alkylation is compared by mean of experimental and theoretical data. The presence of chiral amine substituents induced the diastereoselective generation of the newly formed additional stereocenter.
Synthesis and Second-Order Nonlinearities of Chiral Prolinol-Substituted Chromophores
作者:Shang-Shing P. Chou、Chiung-Yi Yu、Hong-Cheu Lin、Pao-Keng Yang
DOI:10.1002/jccs.200400072
日期:2004.6
A new series of thiophene- and furan-containing chromophores with a chiral prolinol donor and a sulfone acceptor has been synthesized. The UV-vis absorptions, second-ordernonlinear optical properties, and X-ray crystal structures are described.
合成了一系列新的含噻吩和呋喃的发色团,具有手性脯氨醇供体和砜受体。描述了紫外-可见吸收、二阶非线性光学特性和 X 射线晶体结构。