An Acid-Catalyzed Formal Allylic C−H Oxidation of Aryl Cycloalkenes with N-Propylthiosuccinimide
摘要:
A mild acid-catalyzed formal allylic C-H oxidation of aryl cycloalkenes with N-propylthlosuccinimide in the presence of various nucleophiles to generate allylic ethers, esters, and sulfonamides is described. A possible reaction mechanism has been proposed.
An Acid-Catalyzed Formal Allylic C−H Oxidation of Aryl Cycloalkenes with N-Propylthiosuccinimide
摘要:
A mild acid-catalyzed formal allylic C-H oxidation of aryl cycloalkenes with N-propylthlosuccinimide in the presence of various nucleophiles to generate allylic ethers, esters, and sulfonamides is described. A possible reaction mechanism has been proposed.
Catalytic Electrophilic Thiocarbocyclization of Allenes
作者:Quanbin Jiang、Huimin Li、Xiaodan Zhao
DOI:10.1021/acs.orglett.1c03270
日期:2021.11.19
An efficient approach via catalytic electrophilic thiocarbocyclization of allenes to construct indene-based sulfides with excellent regioselectivities is disclosed. The reactions were carried out at low temperatures by selenide catalysis in the presence of TMSOTf. Not only electrophilic arylthio reagents but also electrophilic alkylthio reagents worked well under these conditions. Furthermore, the
Iron-Catalyzed Azidoalkylthiation of Alkenes with Trimethylsilyl Azide and 1-(Alkylthio)pyrrolidine-2,5-diones
作者:Jipan Yu、Min Jiang、Zhixuan Song、Tiancheng He、Haijun Yang、Hua Fu
DOI:10.1002/adsc.201600133
日期:2016.9.1
has been developed at room temperature, and the corresponding products containing ortho‐sited sulfide and azide units were obtained in moderate to good yields with good tolerance of functional groups. The protocol uses readily available 1‐(alkylthio)pyrrolidine‐2,5‐diones and trimethylsilylazide as the alkylthiation and azidation reagents, respectively, inexpensive and environmentally friendly iron
Enantioselective oxysulfenylation and oxyselenenylation of olefins catalyzed by chiral Brønsted acids
作者:Huan Guan、Haining Wang、Deshun Huang、Yian Shi
DOI:10.1016/j.tet.2012.01.006
日期:2012.3
This paper describes Brønsted acid catalyzed enantioselective oxysulfenylation and oxyselenenylation of olefins. Enantiomerically enriched tetrahydrofurans are formed with up to 63% ee with dibenzoyl-d-tartaric acid and its derivatives as catalyst. Chiral β-carboxyl sulfides and selenides have also been obtained with up to 50% and 84% ee, respectively, via enantioselective desymmetrization of thiiranium
molecular sieves as an additive. The reaction conditions were suitable to 4-alkyl and benzyl-substituted azlactones as well as N-(benzyl/alkyl/arylthio)succinimides, affording adducts with high enantioselectivities (81–94% ee).
Enantioselective Construction of Chiral Sulfides via Catalytic Electrophilic Azidothiolation and Oxythiolation of <i>N</i>-Allyl Sulfonamides
作者:Yaoyu Liang、Xiaodan Zhao
DOI:10.1021/acscatal.9b01900
日期:2019.8.2
An efficient and convenient pathway was developed for enantioselective synthesis of chiral sulfides by chiralbifunctional selenide-catalyzed electrophilic azidothiolation and oxythiolation of N-allyl sulfonamides. By this protocol, a variety of chiral vicinal azidosulfides and oxysulfides were obtained in good yields with high enantioselectivities and diastereoselectivities. In this transformation