Copper-catalyzed N-methylation/ethylation of sulfoximines
作者:Fan Teng、Jiang Cheng、Jin-Tao Yu
DOI:10.1039/c5ob01558h
日期:——
A protocol for the copper-catalyzed N-methylation of sulfoximines with di-tert-butyl peroxide (DTBP) was developed. This protocol has good functional group tolerance leading to N-methylated sulfoximines in moderate to good yields. Besides, N-ethylation of sulfoximines was achieved in the presence of bis(1,1-dimethylpropyl)peroxide as the ethylating agent under a standard procedure.
Direct Access to N-Alkylsulfoximines from Sulfides by a Sequential Imidation/Oxidation Procedure
作者:Vincent Bizet、Carsten Bolm、Carl Dannenberg
DOI:10.1055/s-0034-1380536
日期:——
Synthetically relevant N-alkyl-substituted sulfoximines are directly prepared from sulfides by an unprecedented one-pot imidation/oxidation sequence. In situ generated N-bromoalkylamines serve as readily accessible imidating agents leading to N-alkylsulfiliminium bromides that are subsequently oxidized providing the corresponding N-alkylsulfoximines. In this manner, gram quantities of the products can be obtained in a short period of time avoiding the use of toxic and cumbersome to handle alkylating reagents.
Synthesis and Structural Characterization of Molybdenum(VI) and Iron(II) Coordination Compounds with <i>S</i>-Alkyl-<i>N</i>-methyl-<i>S</i>-(2-pyridyl)sulfoximines and Catalytic Epoxidation Activity of the Molybdenum Complexes
作者:Yvonne Brussaard、Falk Olbrich、Ernst Schaumann
DOI:10.1021/ic4020306
日期:2013.11.18
Coordination compounds oxido(diperoxido)(S-butyl-N-methyl-S-(2-pyridyl)sulfoximine)molybdenum(VI), [MoO(O2)2SO(NMe)nBu(NC5H4)}] (5c), and bis(dichlorido)(N,S-dimethyl-2-pyridylsulfoximine)iron(II)}, tetrahydrofuran solvate (1:1) (6), [FeCl2SO(NMe)Me(NC5H4)}]2·THF are prepared from the free ligand 4 and molybdenum(VI) oxidediperoxide(dihydrate) and iron dichloride, respectively. The crystal structures
配位化合物氧化(双过氧化物)(S-丁基-N-甲基-S-(2-吡啶基)亚磺酰亚胺)钼(VI),[MoO(O 2)2 SO(NMe)n Bu(NC 5 H 4)} ](5c)和双(dichlorido)(N,S-二甲基-2-吡啶硫磺酰亚胺)铁(II)},四氢呋喃溶剂化物(1:1)(6),[FeCl 2 SO(NMe)Me(NC)5 H 4)}] 2 ·THF由游离配体4制备分别是二氧化二过氧化钼和二氯化铁。晶体结构揭示了与吡啶环和上钼呈反式排列的单个氧的三角双锥5C和μ的平面2 -Cl 2的Fe 2环与反式取向环外的Cl原子为6,而N个的结构中, N-配位配体几乎不受金属影响。配位化合物(5)有效地催化叔丁基氢过氧化物的环辛烯或单取代烯烃的环氧化。