Regioselective ring-opening reactions of 1,2-epoxides with thiols and arylselenols directly promoted by [Bmim]BF4
作者:Ming-Hua Yang、Guo-Bing Yan、Yun-Fa Zheng
DOI:10.1016/j.tetlet.2008.08.109
日期:2008.11
Regioselective ring-openingreactions of 1,2-epoxides with ArSH and ArSeH promoted by ionic liquid [Bmim]BF4 were investigated. A variety of β-hydroxy selenides and β-hydroxy sulfides were obtained in excellent yields (81–99%) with good regioselectivities using a mild, simple and environmentally benign procedure.
mono-organothiolation of the C–H bond in ferroceneamide has been developed using aryl/alkyl disulfide substrates. The sequential ferrocene C–H organochalcogenation (chalcogen = S, Se, and Te) has also been established for the synthesis of novel hybrid unsymmetrical arylchalcogenides with the aid of a catalytic amount of Cu(OAc)2 under ambient reaction conditions. The developed protocol results in a broad functional
Regioselective Deiodination of Thyroxine by Iodothyronine Deiodinase Mimics: An Unusual Mechanistic Pathway Involving Cooperative Chalcogen and Halogen Bonding
作者:Debasish Manna、Govindasamy Mugesh
DOI:10.1021/ja210478k
日期:2012.3.7
Iodothyroninedeiodinases (IDs) are mammalian selenoenzymes that catalyze the conversion of thyroxine (T4) to 3,5,3'-triiodothyronine (T3) and 3,3',5'-triiodothyronine (rT3) by the outer- and inner-ringdeiodination pathways, respectively. These enzymes also catalyze further deiodination of T3 and rT3 to produce a variety of di- and monoiodo derivatives. In this paper, the deiodinase activity of a
Palladium‐Catalyzed Thio‐ and Selenocarbonylation of 2‐Iodoglycals
作者:Mariana P. Darbem、Henrique A. Esteves、Isadora M. Oliveira、Daniel C. Pimenta、Hélio A. Stefani
DOI:10.1002/cctc.201901403
日期:2020.1.18
The carbonylative cross‐coupling reactions of 2‐iodoglycals with thiols and selenols in the presence of molybdenum hexacarbonyl as a solid source of carbon monoxide is described. This methodology permitted the synthesis of 29 C2‐glycosides bearing thioester and selenoester functionalities in moderate to excellent yields and high functional group tolerance. Moreover, this communication describes the