Structural, Mechanistic, Spectroscopic, and Preparative Studies on the <i>Lewis</i>
Base Catalyzed, Enantioselective Sulfenofunctionalization of Alkenes
作者:Eduard Hartmann、Scott E. Denmark
DOI:10.1002/hlca.201700158
日期:2017.9
with the spectroscopic identification of putative thiiranium ion intermediates generated in the enantiodetermining step. The structural insights gleaned from these studies informed the design of new catalyst architectures to improve enantioselectivity. In addition, structural modification of the sulfenylating agents had a significant and salutary effect on the enantioselectivity of sulfenofunctionalization
Copper‐Catalyzed Electrophilic Thiolation of Organozinc Halides by Using
<i>N</i>
‐Thiophthalimides Leading to Polyfunctional Thioethers
作者:Simon Graßl、Clémence Hamze、Thaddäus J. Koller、Paul Knochel
DOI:10.1002/chem.201806261
日期:2019.3.12
(Hetero)aryl, benzylic, and alkyl zinc halides were thiolated with N‐thiophthalimides at 25 °C within 1 h in the presence of 5–10 % Cu(OAc)2⋅H2O to furnish the corresponding polyfunctionalized thioethers in good yields. This electrophilic thiolation was extended to the introduction of trifluoromethylthio (SCF3), thiocyanate (SCN), and selenophenyl (SePh) groups. The utility of this method was shown
Comparison of conventional and microwave-assisted synthesis of some new sulfenamides under free catalyst and ligand
作者:Hasan Yakan、Halil Kütük
DOI:10.1007/s00706-018-2261-4
日期:2018.11
AbstractSulfenamide and its derivatives (S–N bond) have been synthesized with classical method in the literature. However, microwave-assistedsynthesis of a series of N-(substituted phenylthio), N-(benzylthio), N-(cyclothio), and N-(2-mercaptobenzimidazolyl)amines has been not in the literature yet. They have been obtained from treating some amines (4 mmol) with thiophthalimides (PhthSR, 1 mmol) using
Mechanistic, crystallographic, and computational studies on the catalytic, enantioselective sulfenofunctionalization of alkenes
作者:Scott E. Denmark、Eduard Hartmann、David J. P. Kornfilt、Hao Wang
DOI:10.1038/nchem.2109
日期:2014.12
of vicinal heteroatomic substituents into organic molecules is one of the most powerful ways of adding value and function. Although many methods exist for the introduction of oxygen- and nitrogen-containing substituents, the number of stereocontrolled methods for the introduction of sulfur-containing substituents pales by comparison. Previous reports fromour laboratories have described sulfenofunctionalizations
Asymmetric sulfenylation of 3-CF 3 -Oxindoles through organocatalysis with a quinidine derivative
作者:Yidan E、Teng Yuan、Liang Yin、Youjun Xu
DOI:10.1016/j.tetlet.2017.05.015
日期:2017.6
An asymmetric sulfenylation of 3-CF3-oxindoles catalyzed by a quinidine derivative was described. 3-CF3-oxindoles with electro-donating groups led to corresponding products in good yield and with good enantioselectivity while 3-CF3-oxindoles bearing electro-withdrawing groups were not competent substrates due to its significant decomposition at the optimal reaction conditions. As for the sulfenylation