22896-71-5Relevant articles and documents
Organocatalytic Enantioselective Aminoalkylation of 5-Aminopyrazole Derivatives with Cyclic Imines
Carceller-Ferrer, Laura,González del Campo, Aleix,Vila, Carlos,Blay, Gonzalo,Mu?oz, M. Carmen,Pedro, José R.
supporting information, p. 7450 - 7454 (2020/11/30)
In this communication, an efficient asymmetric aminoalkylation of 5-aminopyrazole derivatives with cyclic benzoxathiazine 2,2-dioxides catalyzed by a quinine-derived squaramide in dichloromethane has been established. This is the first example of 5-aminopyrazole derivatives in asymmetric catalysis. A variety of chiral sulfamidates bearing an aminopyrazole moiety were obtained in good yields (up to 98 %) and moderate to excellent enantioselectivities (up to 99 %ee).
Synthesis and application of a fluorous Lawesson's reagent: Convenient chromatography-free product purification
Kaleta, Zoltan,Tarkanyi, Gabor,Goemoery, Agnes,Kalman, Ferenc,Nagy, Tamas,Soos, Tibor
, p. 1093 - 1095 (2007/10/03)
A fluorous analogue of Lawesson's reagent for thionation of carbonyl compounds has been developed and its use demonstrated on a series of amides, esters, and ketones. The separation of the Lawesson's reagent-derived byproducts can be achieved by a simple fluorous solid-phase extraction.
