Palladium-Catalyzed Allylic Amination of Homoallylic Alcohols with Amines via Carbon–Carbon Bond Cleavage
作者:Qiang Kang、Gui-Jun Sun、Yong Wang
DOI:10.1055/s-0034-1380418
日期:——
Abstract An efficient approach for palladium(II) acetate catalyzed allylic amination of homoallylic alcohols with various amines via sequential retro-allylation and amination was developed, which afforded the corresponding allylic amines in up to 98% yield. An efficient approach for palladium(II) acetate catalyzed allylic amination of homoallylic alcohols with various amines via sequential retro-allylation
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。
Superacid synthesized tertiary benzenesulfonamides and benzofuzed sultams act as selective hCA IX inhibitors: toward understanding a new mode of inhibition by tertiary sulfonamides
作者:Benoît Métayer、Agnès Martin-Mingot、Daniella Vullo、Claudiu. T. Supuran、Sébastien Thibaudeau
DOI:10.1039/c3ob41538d
日期:——
did not inhibit the widespread off target hCA II isoform and showed strong selectivity toward tumor-associated carbonic anhydrase isoform IX. A dramatic effect of the electronic and structural shape of the inhibitors on selectivity was demonstrated, confirming the non-zinc-bonding mode of inhibition of this class of sulfonamides. This work allowed identifying a highly selectivehCA IX inhibitor lead in
Synthesis of highly substituted dibenzoazocine derivatives by the aza-Claisen rearrangement and intramolecular Heck reaction via 8-exo-trig mode of cyclization
The synthesis of highly substituted dibenzo-azocine systems is still lacking. An efficient synthetic protocol utilizing the sequential aromatic aza-Claisen rearrangement followed by the implementation of the intramolecularHeck reaction as a key step has been developed for the synthesis of various dibenzo-azocine derivatives of biological relevance.
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.