Synthesis of cyclic sulfonamides by reaction of N-sulfinyl-3-(trifluoromethyl)aniline with norbornenes
摘要:
N-Sulfinyl-3-(trifluoromethyl)aniline reacted with bicyclo[2.2.1]hept-2-ene and bicyclo[2.2.1]-hepta-2,5-diene to give the corresponding DielsaEuro'Alder adducts which were oxidized to 8-trifluoromethyl-2,3,4,4a,6,10b-hexahydro-5 lambda (6)-1,4-methanodibenzo[c,e][1,2]thiazine-5,5(1H)-diones. The cycloaddition occurred predominantly with participation of the S=N-C-1=C-6 fragment of N-sulfinyl-3-(trifluoromethyl)aniline and exclusively at the endo side of bicyclo[2.2.1]heptenes.
Highly Enantioselective Pictet-Spengler Reactions with α-Ketoamide-Derived Ketimines: Access to an Unusual Class of Quaternary α-Amino Amides
作者:Farhan R. Bou-Hamdan、James L. Leighton
DOI:10.1002/anie.200806110
日期:2009.3.16
story? N‐Aryl amides are effective directing/activating groups for chlorosilane Lewis acids. This aspect has been exploited for the development of the first simple and general method for the highlyenantioselective Pictet–Spengler reaction of ketimines derived from α‐ketoamides leading to quaternary α‐aminoacid derivatives (see scheme).
Assessment of the molecular structure and spectroscopic properties of CF3-substituted sulfinylaniline derivatives
作者:Doly M. Chemes、José O.G. Lezama、Edgardo H. Cutin、Norma Lis Robles
DOI:10.1016/j.molstruc.2021.129879
日期:2021.4
o-trifluoromethylsulfinylaniline may provide conformational and vibrational properties of interest for the synthesis of compounds of pharmacological relevance, as it was observed for other N-sulfinylaniline derivatives previously reported. The air sensitive and highly reactive compounds under study were prepared by the reaction of the corresponding aniline derivatives and thionyl chloride. The liquid samples
Two Pd-catalyzed asymmetric [3+2] annulations are disclosed, providing a modular platform for the enantioselective synthesis of chiral thio-oxazolidinones. Preliminary mechanistic studies are performed to rationalize the observed enantio- and diastereo-controls.
cascade O-sulfination and desulfurdioxidative N−N coupling (via stepwise retro-[2π+2σ] cycloaddition, supported by quantum chemistry calculations) from readily available N-arylhydroxylamines and N-sulfinylanilines under metal and oxidant free conditions.