FeBr3-catalyzed regioselective hydroxysulfenylation of N-allylsulfonamides with sulfonyl hydrazides
作者:Zhong-Qi Xu、Lin-Chuang Zheng、Lin Li、Lili Duan、Yue-Ming Li
DOI:10.1016/j.tet.2018.12.044
日期:2019.2
Regioselective hydroxysulfenylation of unactivated CC double bonds was reported. Using FeBr3-bpy as the catalyst, Na2S2O8 as the oxidant, and sulfonylhydrazides as the sulfenyl sources, hydroxysulfenylation of unfunctionalized olefins proceeded readily, giving a variety of β-hydroxysulfides in moderate to good isolated yields.
报道了未活化的C C双键的区域选择性羟基亚磺酰基化。使用FeBr 3 -bpy作为催化剂,使用Na 2 S 2 O 8作为氧化剂,使用磺酰肼作为亚磺酰基来源,未官能化烯烃的羟基亚磺酰基化反应容易进行,得到了各种中等至良好分离产率的β-羟基硫化物。
Enantioselective Synthesis of 3‐Fluorochromanes via Iodine(I)/Iodine(III) Catalysis
作者:Jérôme C. Sarie、Christian Thiehoff、Jessica Neufeld、Constantin G. Daniliuc、Ryan Gilmour
DOI:10.1002/anie.202005181
日期:2020.8.24
bioactive small molecules where it is frequently oxidized at position 3. Motivated by the importance of this position in conferring efficacy, and the prominence of bioisosterism in drug discovery, an iodine(I)/iodine(III) catalysis strategy to access enantioenriched 3‐fluorochromanes is disclosed (up to 7:93 e.r.). In situ generation of ArIF2 enables the direct fluorocyclization of allyl phenyl ethers to generate
苯并二氢吡喃核是生物活性小分子的共有核,在位置 3 上经常被氧化。由于该位置在赋予功效方面的重要性以及生物电子等排性在药物发现中的突出地位,碘 (I)/碘 (III) )公开了获得对映体富集的 3-氟色满的催化策略(高达 7:93 er .)。原位生成 ArIF 2能够直接氟环化烯丙基苯基醚,生成表现出立体电子疏忽效应的新型支架。使用氘代探针进行的机械询问证实了与 II 型inv途径一致的立体特异性过程。
Ligand‐Controlled Regiodivergence for Catalytic Stereoselective Semireduction of Allenamides
作者:Mojtaba Hajiloo Shayegan、Zhong‐Yuan Li、Xin Cui
DOI:10.1002/chem.202103402
日期:2022.1.3
A palladium-catalyzed, ligand controlled regiodivergent semireduction of allenamides has been developed. This phosphine ligand-switched semireduction system has enabled an easy access to a broad scope of allylic and vinylic amides by using a single palladium catalyst. The excellent regio- and stereoselectivities of the divergent processes were achieved by the employment of monodentate Xphos and bidentate
New superacid synthesized (fluorinated) tertiary benzenesulfonamides acting as selective hCA IX inhibitors: toward a new mode of carbonic anhydrase inhibition by sulfonamides
作者:Benoît Métayer、Agnès Mingot、Daniella Vullo、Claudiu. T. Supuran、Sébastien Thibaudeau
DOI:10.1039/c3cc40858b
日期:——
Tertiary substituted (fluorinated) benzenesulfonamides were synthesized in superacid HF/SbF5 and tested as inhibitors of human carbonic anhydrases (hCAs, EC 4.2.1.1). Strong selectivity toward tumor-associated hCA IX, without inhibiting the offtarget hCA II, was observed, pointing out to a new mechanism of action compared to classical sulfonamides.