Expeditious and Efficient
ortho
‐Selective Trifluoromethane‐sulfonylation of Arylhydroxylamines
摘要:
AbstractA metal‐ and oxidant‐free, practical and efficient method for the synthesis of highly versatile and synthetically useful ortho‐trifluoromethanesulfonylated anilines from arylhydroxylamines and trifluoromethanesulfinic chloride was developed. This rapid transformation proceeded smoothly with good yields and excellent ortho‐selectivity in the absence of any metals or ligands. Mechanistically, the reaction comprised a noncanonical O‐trifluoromethanesulfinylation of the arylhydroxylamine, and the subsequent [2,3]‐sigmatropic rearrangement to afford ortho‐trifluoromethanesulfonylated aniline derivatives. The practical application of this reaction was demonstrated by further conversion into a series of functional molecules under different reaction conditions.
Synthesis of dibenzothiazepine analogues by one-pot <i>S</i>-arylation and intramolecular cyclization of diaryl sulfides and evaluation of antibacterial properties
Dibenzothiazepine analogues containing lactam, amidine and imine moieties were prepared from 2-aminophenyl disulfides via one-pot S-arylation. The S-arylation involved cleavage of an S-S bond of disulfides and SNAr reaction in aqueous ammonia solution of L-cysteine to afford diaryl sulfides. Dibenzothiazepine analogues having lactam and amidine moieties were obtained by cyclization of the corresponding
摘要 以2-氨基苯基二硫化物为原料,通过一锅S-芳基化反应制备了含有内酰胺、脒和亚胺部分的二苯并硫氮杂类似物。S-芳基化包括二硫化物的 SS 键断裂和 L-半胱氨酸氨水溶液中的 SNAr 反应,得到二芳基硫化物。具有内酰胺和脒部分的二苯并硫氮杂类似物是通过在酸性条件下环化相应的二芳基硫化物而获得的。2-溴-5-硝基苯甲醛的一锅S-芳基化通过分子内环化一步得到具有亚胺部分的二苯并硫氮杂类似物。获得了对金黄色葡萄球菌和大肠杆菌具有抗菌活性的化合物。
[EN] NOVEL COMPOUNDS<br/>[FR] NOUVEAUX COMPOSÉS
申请人:GLAXO GROUP LTD
公开号:WO2011151361A1
公开(公告)日:2011-12-08
The invention relates to tricyclic derivatives, and their use in treating diseases and conditions mediated by antagonism of the mGluR5 receptor, in particular substance related disorders. In addition, the invention relates to compositions containing the derivatives and processes for their preparation.
Novel Green Procedure for the Synthesis of 2-Arylbenzothiazoles Under Microwave Irradiation in Peg 200 Or Peg 400
作者:Todor G. Deligeorgiev、Stefka Kaloyanova、Aleksey Vasilev、Juan J. Vaquero
DOI:10.1080/10426501003598648
日期:2010.10.28
An improved green procedure for the synthesis of 2-aryl- and 2-hetarylbenzothiazoles by condensation of equivalent amounts of 2,2′-diaminodiphenyldisulfides or 2-aminothiophenols and various aromatic aldehydes in PEG 200/400 undermicrowaveirradiation has been developed. This method allows the synthesis of 2-arylbenzothiazoles in high yields and with high purity regardless of the state of the starting
efficient method for preparing benzothiazolone derivatives was developed by a domino coupling reaction between the disulfide and COS in the present of NaOH. Notably, the C=O of COS was converted into benzothiazolone by carbonylation reaction and the sulfur of COS was transformed into sulfur and sulfide after cleaving the S–S bond undermildconditions. This efficient synthetic methodology could provide
The present invention relates to a fluoroallylamine derivative and use thereof. In particular, the present invention relates to a compound as shown in Formula I, a prodrug, an isomer, an isotope-labeled compound, a solvate or a pharmaceutically acceptable salt thereof, which has VAP-1/SSAO inhibitory activity, and can be used for treating a disease associated with VAP-1/SSAO overactivity.