Merrifield resin supported phenanthroline–Cu(I): a highly efficient and recyclable catalyst for the synthesis of 2-aminobenzothiazoles via the reaction of 2-haloanilines with isothiocyanates
作者:Jin Yang、Pinhua Li、Lei Wang
DOI:10.1016/j.tet.2011.05.121
日期:2011.8
recyclable catalyst in the reaction of 2-halobenzenamines with isothiocyanates for the synthesis of 2-aminobenzothiazoles. The reactions were applicable to a variety of 2-halobenzenamines and isothiocyanates, and generated the corresponding 2-aminobenzothiazoles in good yields under mild reaction conditions. Moreover, the catalyst was quantitatively recovered from the reaction mixture by a simple filtration
Postsynthetic modification of IRMOF-3 with a copper iminopyridine complex as heterogeneous catalyst for the synthesis of 2-aminobenzothiazoles
作者:Jie Liu、Xiaobin Zhang、Jin Yang、Lei Wang
DOI:10.1002/aoc.3109
日期:2014.3
A copperiminopyridinecomplex has been immobilized on to a metal–organic framework (MOF) through postsyntheticmodification of IRMOF‐3. The modified MOFs were fully demonstrated by using a variety of methods, and the structural integrity of the modified MOFs has been confirmed by powder X‐ray diffraction (XRD). Furthermore, it was shown that the modified IRMOF‐3 can act as an efficient solid catalyst
Synthesis of 2-Aminobenzothiazoles via Copper(I)-Catalyzed Cross-Coupling with Part-Per-Million Catalyst Loadings
作者:Ya-Lei Sun、Yuan Zhang、Xiao-Hui Cui、Wei Wang
DOI:10.1002/adsc.201100054
日期:2011.5.9
An efficient protocol has been developed for the preparation of 2‐aminobenzothiazoles via a copper(I)‐catalyzed tandem reaction of 2‐iodoanilines with isothiocyanates at very low catalyst loadings [typically 50 ppm of copper(I) iodide (CuI)]. A variety of 2‐iodoanilines could be cross‐coupled with isothiocyanates, affording 2‐aminobenzothiazoles in moderate to good yields (49–93%) under the given conditions
Transition-Metal-Free <i>O</i>-, <i>S</i>-, and <i>N</i>-Arylation of Alcohols, Thiols, Amides, Amines, and Related Heterocycles
作者:Rafael Cano、Diego J. Ramón、Miguel Yus
DOI:10.1021/jo1022052
日期:2011.1.21
A new protocol for the Ullmann-type arylation process of different aromatic heterocycles without any transition-metal catalyst, implying the use of a combination of an excess of potassium hydroxide and dimethyl sulfoxide, is described. The reaction can be performed between a broad range of starting nucleophiles including phenol, alcohols, amines, nitrogen-containing five-membered systems such as pyrazoles, imidazoles, and indoles, and amides with haloarenes, iodide and bromide derivatives giving the best results, the possible pathway involving the in situ generation of the corresponding benzyne intermediate. When the reaction was performed with 2-iodoaniline and either carboxarnides or isothiocyanato derivatives, the corresponding benzoazole derivatives were obtained.