开放获取:通常无法直接将噻吩的反应性降低的噻吩的β位置进行直接功能化。但是,在噻吩与碘代芳烃的芳基化反应中,催化体系PdCl 2 / P {OCH(CF 3)2 } 3 / Ag 2 CO 3所观察到的β选择性是一种显着的普遍现象,适用于未取代的,单取代的,和二取代的噻吩衍生物,以及含噻吩的稠合芳族化合物。
Adamantanyl-substituted PEPPSI-type palladium(II) N-heterocyclic carbene complexes: synthesis and catalytic application for CH activation of substituted thiophenes
作者:Vladimir A. Glushkov、Michail S. Denisov、Aleksey A. Gorbunov、Yurii A. Myalitzin、Maksim V. Dmitriev、Pavel A. Slepukhin
DOI:10.1007/s10593-019-02445-1
日期:2019.3
salts and corresponding unsymmetrically substituted Pd(II) PEPPSI-type complexes were prepared, including dichloride, dibromide, and diiodide. Single crystal X-ray crystallography confirmed solid state structures in six cases. The complexes reported in this work displayed moderate activities as precatalysts for CH activation/arylation reaction of substituted thiophenes.
less‐reactive β position of thiophenes was previously inaccessible to direct functionalization. However, the β selectivity observed with the catalytic system PdCl2/POCH(CF3)2}3/Ag2CO3 in the arylation of thiophenes with iodoarenes (see scheme) is a remarkably general phenomenon applicable to unsubstituted, monosubstituted, and disubstituted thiophene derivatives, as well as thiophene‐containing fused aromatic
开放获取:通常无法直接将噻吩的反应性降低的噻吩的β位置进行直接功能化。但是,在噻吩与碘代芳烃的芳基化反应中,催化体系PdCl 2 / P OCH(CF 3)2 } 3 / Ag 2 CO 3所观察到的β选择性是一种显着的普遍现象,适用于未取代的,单取代的,和二取代的噻吩衍生物,以及含噻吩的稠合芳族化合物。