[3+2] Anionic Cycloaddition of Isocyanides to Acyclic Enamines and Enaminones: A New, Simple, and Convenient Method for the Synthesis of 2,4-Disubstituted Pyrroles
作者:Ilya V. Efimov、Maria D. Matveeva、Rafael Luque、Vasiliy A. Bakulev、Leonid G. Voskressensky
DOI:10.1002/ejoc.201901776
日期:2020.3.8
Herein, a new route toward 2,4‐substituted pyrroles is presented. This is a new, simple, fast, and convenientmethod furnishing 2,4‐substituted pyrroles based on the formal cycloaddition reaction of isocyanides with acyclic enamines or enaminones under basic conditions.
Iodine-mediated synthesis of sulfur-bridged enaminones and chromones via double C(sp<sup>2</sup>)–H thiolation
作者:Yong Gao、Li Wei、Yunyun Liu、Jie-Ping Wan
DOI:10.1039/c7ob00619e
日期:——
reactions of various enaminones with elemental sulfur giving rise to both sulfur-bridged enaminones and chromones have been realized via iodine promotion. All products were furnished by means of double C(sp2)–H bond thiolation without using any metal catalyst or sensitive oxidant, providing a simple and efficient protocol for the synthesis of diverse sulfur derivatives of enaminones.
Pyridopyrimidine protein tyrosine phosphatase inhibitors
申请人:Berthel Joseph Steven
公开号:US20070021445A1
公开(公告)日:2007-01-25
The present invention comprises pyridopyrimidinediamine compounds of the general formula I:
The compounds of the present invention are potent inhibitors of PTP1B. Accordingly, the invention also encompasses pharmaceutical compositions and methods of treating or preventing PTP-1B mediated diseases, including diabetes, obesity, and diabetes-related diseases.
The tunable synthesis of benzothiazole functionalized vicinal diketones and 2-aroylbenzothiazoles has been realized by tailoring the enaminone CC double bond.
苯并噻唑官能化邻二酮和2-芳酰基苯并噻唑的可调合成已通过调整烯胺酮的C=C双键实现。
Transition Metal‐free C−H Sulfonylation and Pyrazole Annulation Cascade for the Synthesis of 4‐Sulfonyl Pyrazoles
作者:Lihong Tian、Jie‐Ping Wan、Shouri Sheng
DOI:10.1002/cctc.202000244
日期:2020.5.7
A practical protocol for the synthesis of 4‐sulfonyl pyrazoles via the reactions of readily available N,N‐dimethyl enaminones and sulfonyl hydrazines has been developed via the catalysis of molecular iodine in the presence of TBHP and NaHCO3 at room temperature. The pyrazole products have been constructed via the tandem C(sp2)−H sulfonylation and a pyrazole annulation without employing any transition