Ruthenium (II)‐Catalyzed Oxidant‐Free Coupling/Cyclization of Benzimidates and Sulfoxonium Ylides to Form Substituted Isoquinolines
作者:Xinxia Shi、Rongchao Wang、Xiaofei Zeng、Yilan Zhang、Huiling Hu、Chunsong Xie、Min Wang
DOI:10.1002/adsc.201800844
日期:2018.11.5
A ruthenium‐catalyzed direct mono‐C−H functionalization/annulation cascade reaction of benzimidates and sulfoxoniumylides has been developed. The reaction proceeds smoothly with a broad range of substrates, giving access to a variety of isoquinoline derivatives in moderate to good yields using an organic acid additive under oxidantfree conditions.
The invention is concerned with novel heterocyclic compounds of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are as hereinafter set forth, and their acid addition salts, processes for the preparation of these compounds, pest control compositions which contain these compounds as the active substance, as well as the methods of use of such compounds or compositions for the control of pests.
Direct Synthesis of Biphenyl-2-carbonitriles by Rh(III)-Catalyzed C–H Hiyama Cross-Coupling in Water
作者:Xiuqi Zhang、Fukuan Zhang、Xiaolan Li、Ming-Zhu Lu、Xin Meng、Lei Huang、Haiqing Luo
DOI:10.1021/acs.orglett.2c01754
日期:2022.7.22
This method represents an efficient rhodium(III)-catalyzed o-C–H arylation of readily available benzimidate derivatives with diverse arylsilanes in water as a sustainable solvent, enabling the straightforward synthesis of potentially useful biphenyl-2-carbonitrile derivatives. This silicon-based protocol employs benzimidates as both an efficacious directing group and the source of a nitrile group.
A series of 3,5-diaryl-s-triazoles were synthesized and evaluated as postimplantation contragestational agents. The introduction of various substituents (e.g., an o-alkyl chain on one phenyl and a m-alkoxy group on the other) was found to increase the potency. Several compounds with very high pregnancy-terminating activity in both hamsters and rats were obtained. One of these, 3-(2-ethylphenyl)-5-(3-methoxyphenyl)-s-triazole, DL 111 (36), was selected for detailed evaluation in various animal species. A synthetic scheme for the preparation of these compounds and preliminary structure-activity relationships are presented.
OMODEI-SALE, A.;CONSONNI, P.;GALLIANI, G., J. MED. CHEM., 1983, 26, N 8, 1187-1192