66917-06-4Relevant articles and documents
Design and synthesis of a bis-macrocyclic host and guests as building blocks for small molecular knots
Fenlon, Edward E.,Keyes, Rebecca J.,Lockey, Stephen D.,Margolis, Elizabeth A.
, p. 2314 - 2321 (2020)
The thread-link-cut (TLC) approach has previously shown promise as a novel method to synthesize molecular knots. The modular second-generation approach to small trefoil knots described herein involves electrostatic interactions between an electron-rich bismacrocyclic host compound and electron-deficient guests in the threading step. The bis-macrocyclic host was synthesized in eight steps and 6.6% overall yield. Ammonium and pyridinium guests were synthesized in 4-5 steps. The TLC knot-forming sequence was carried out and produced a product with the expected molecular weight, but, unfortunately, further characterization did not produce conclusive results regarding the topology of the product.
Copper-catalyzed cascade click/nucleophilic substitution reaction to access fully substituted triazolyl-organosulfurs
Li, Ming,Dong, Kun,Zheng, Yubin,Song, Wangze
supporting information, p. 9933 - 9941 (2019/12/06)
A novel cascade click/nucleophilic substitution reaction is developed to access 4-heterofunctionalized fully substituted triazolyl-organosulfurs using thiocyanates as both leaving groups and organosulfur precursors. This method features high regioselectivities and board substrate scope. 33 examples are shown to demonstrate the structural diversity through the synthesis of fully substituted triazolyl-organosulfurs including triazolyl-thiocyanates, triazolyl-sulfinylcyanides, triazolyl-thioethers, triazolyl-thiols and triazolyl-disulfides from internal thiocyanatoalkynes.
Rhodium(I)-Catalyzed Regioselective Azide-internal Alkynyl Trifluoromethyl Sulfide Cycloaddition and Azide-internal Thioalkyne Cycloaddition under Mild Conditions
Song, Wangze,Zheng, Nan,Li, Ming,He, Junnan,Li, Junhao,Dong, Kun,Ullah, Karim,Zheng, Yubin
supporting information, p. 469 - 475 (2019/01/04)
A regioselective method to access fully substituted 5-trifluoromethylthio-1,2,3-triazoles and 5-thio-1,2,3-triazoles from the internal alkynyl trifluoromethyl sulfides and internal thioalkynes by a rhodium(I)-catalyzed azide-alkyne cycloaddition (RhAAC) reaction under mild conditions has been developed. This approach features good compatibility with water and air, a broad substrate scope, good functional group tolerance, high yields and excellent regioselectivities. The high 1,5-regioselectivities were controlled by the strong coordination between the sulfur atom and the π-acidic rhodium. The advantages of this method further include its applicability to gram-scale preparation, the use of solid-phase synthesis technique, and the mutually orthogonal CuAAC-RhAAC reaction. (Figure presented.).