Metal-Free Cross-Coupling of Arylboronic Acids and Derivatives with DAST-Type Reagents for Direct Access to Diverse Aromatic Sulfinamides and Sulfonamides
作者:Qiang Wang、Xiang-Ying Tang、Min Shi
DOI:10.1002/anie.201605066
日期:2016.8.26
We have developed a simple and convenient method for the cross‐coupling of arylboronicacids and their derivatives with DAST‐type reagents under mild and metal‐freeconditions to directly afford sulfinamides in moderate to good yields. Moreover, sulfonamides were obtained after a simple oxidation reaction. The reaction mechanism was investigated by 18O‐labeling experiments, and the synthetic utility
The reactions of N-trimethylsilyl derivatives of α- and β-amino acid esters with sulfur tetrafluoride lead to the formation of the corresponding difluorides of imidosulfurous acids F2S=N-X (X = α or β-amino acid residue). The reaction products of difluorides with N-trimethylsilylmorpholine are ketimines or aldimines of new types, containing an imine fragment =N-S-NR2 at the α- or β-carbon atom of the
Simple Route to Adducts of (Amino)(aryl)carbene with Phosphorus Pentafluoride
作者:Olexandr I. Guzyr、Sergiy V. Zasukha、Yurii G. Vlasenko、Alexander N. Chernega、Alexander B. Rozhenko、Yuriy G. Shermolovich
DOI:10.1002/ejic.201300563
日期:2013.8.12
The tetramethyl ester of (hydroxy)(phenyl)methylenebis(phosphonic acid) reacts with morpholinosulfur trifluoride (MOST) to provide, along with the expected product of the substitution of a hydroxy group by fluorine, the adduct of (morpholino)(phenyl)carbene with PF5, compound 3a. Fluorination of dimethyl α-aroylphosphonates with MOST yields adducts of (amino)(aryl)carbene with PF5 (p-XC6H4)(Morph)C:PF5
(羟基)(苯基)亚甲基双(膦酸)的四甲酯与吗啉代三氟化硫(MOST)反应,与氟取代羟基的预期产物一起提供(吗啉代)(苯基)卡宾的加合物与PF5,化合物3a。用 MOST 氟化 α-芳酰基膦酸二甲酯生成(氨基)(芳基)卡宾与 PF5 (p-XC6H4)(Morph)C:PF5 [3a–f,其中 Morph 是吗啉,X = H (a),Me ( b)、OEt(c)、F(d)、Cl(e)、CF3(f)]作为主要反应产物。提出的反应机理是基于实验数据和 DFT 计算。加合物 3a 的结构由 X 射线研究确定。分别在苯环上带有取代基 Cl 和 CF3 的化合物 3e 和 3f 水解,产生以前未知的苯甲酰五氟磷酸盐 [p-XC6H4–C(=O)PF5]–MorphH+。
Syntheses of methyl (4,6-dideoxy-α-l-lyxo-hexopyranosyl)-(1→3)- and (4-deoxy-4-fluoro-α-l-rhamnopyranosyl)-(1→3)-2-acetamido-2-deoxy-α-d-glucopyranosides, analogs of the mycobacterial arabinogalactan linkage disaccharide
作者:Philip G. Hultin、Ryan M. Buffie
DOI:10.1016/s0008-6215(99)00203-7
日期:1999.11
6-dideoxy- l - lyxo -hexopyranosyl (‘4-deoxy- l -rhamnosyl’) and 4-deoxy-4-fluoro- l -rhamnosyl monosaccharide residues. The preparation of the deoxyfluororhamnose was not straightforward, and revealed some unexpected behavior of the diethylaminosulfur trifluoride (DAST) reagent. The new glycosyl donors were used to synthesize two analogs of the mycobacterial arabinogalactan linkage disaccharide →4)-α- l
[EN] DISUBSTITUTED-AMINODIFLUOROSULFINIUM SALTS, PROCESS FOR PREPARING SAME AND METHOD OF USE AS DEOXOFLUORINATION REAGENTS<br/>[FR] SELS DE (AMINO DISUBSTITUÉ)DIFLUOROSULFINIUM, LEURS PROCÉDÉS DE PRÉPARATION ET D'UTILISATION EN TANT QUE RÉACTIFS DE DÉSOXOFLUORATION
申请人:OMEGACHEM INC
公开号:WO2010145037A1
公开(公告)日:2010-12-23
The invention relates to disubstituted-aminodifluorosulfinium salts represented by the formula (I). Processes for preparing same and methods of use as deoxofluorinating reagent is also provided.