An article Photocatalytic three-component asymmetric sulfonylation via direct C(sp(3))-H functionalization WOS:000642744500008 published article about C-H FUNCTIONALIZATION; STEREOSELECTIVE FUNCTIONALIZATION; SULFUR-DIOXIDE; ALKYLATION; CATALYST; ORGANOCATALYSIS; BORYLATION; ALLYLATION; INHIBITOR; ARYLATION in [Cao, Shi; Hong, Wei; Ye, Ziqi; Gong, Lei] Xiamen Univ, Coll Chem & Chem Engn, iChEM, Key Lab Chem Biol Fujian Prov, Xiamen, Fujian, Peoples R China in 2021.0, Cited 80.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6. HPLC of Formula: C5H8N2
The direct and selective C(sp(3))-H functionalization of cycloalkanes and alkanes is a highly useful process in organic synthesis owing to the low-cost starting materials, the high step and atom economy. Its application to asymmetric catalysis, however, has been scarcely explored. Herein, we disclose our effort toward this goal by incorporation of dual asymmetric photocatalysis by a chiral nickel catalyst and a commercially available organophotocatalyst with a radical relay strategy through sulfur dioxide insertion. Such design leads to the development of three-component asymmetric sulfonylation involving direct functionalization of cycloalkanes, alkanes, toluene derivatives or ethers. The photochemical reaction of a C(sp(3))-H precursor, a SO2 surrogate and a common alpha,beta-unsaturated carbonyl compound proceeds smoothly under mild conditions, delivering a wide range of biologically interesting alpha-C chiral sulfones with high regio- and enantioselectivity (>50 examples, up to >50:1 rr and 95% ee). This method is applicable to late-stage functionalization of bioactive molecules, and provides an appealing access to enantioenriched compounds starting from the abundant hydrocarbon compounds. The direct and selective C(sp(3))-H functionalization of cycloalkanes and alkanes is useful in organic synthesis but its application to asymmetric catalysis has been less explored. Here, the authors demonstrate the incorporation of a dual asymmetric photocatalyst which leads to the development of asymmetric sulfonylation involving direct functionalization of cycloalkanes, alkanes, toluene derivatives or ethers.
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Reference:
Pyrazole – Wikipedia,
,Pyrazoles – an overview | ScienceDirect Topics