Two new chemosensors (1a and 1b) based on photochromic dithienylcyclopentene were designed and synthesized, and their spectral behaviors toward various metal ions and anions were investigated in detail. Compounds show excellent optical properties and distinguish Hg2+ and F- in CH3CN. Job's plot reveals that the presence of Hg2+ induces the formation of a 1:1 complex between 1a or 1b and Hg2+. From the spectral responses and H-1 NMR analysis, the deprotonation of the thioamide protons is proposed to explain the sensing mechanism for 1a and 1b toward F. It is found that 1a and 1b exhibit ring-opening and ring-closing photoisomerization with UV-vis light irradiation. Furthermore, their photochromic properties can be modulated by Hg2+ and F- ions. Moreover, 1a and 1b in photostationary states become promising sensors for Hg2+ and F- with high selectivity. (C) 2010 Elsevier Ltd. All rights reserved.
Arylmethylphosphonates and phosphonic acids useful as anti-inflammatory
申请人:The Upjohn Company
公开号:US05500417A1
公开(公告)日:1996-03-19
This invention provides a new use of acids, esters, and salts of arylmethylphosphonates of Formula I, ##STR1## or phosphonic acid derivatives of Formula II ##STR2## as anti-inflammatory and anti-arthritic agents. Representative compounds include 4-dodecyloxybenzylphosphonic acid dimethyl ester, (2-naphthalenylmethyl)phosphonic acid dimethyl ester, and ([1,1 '-biphenyl]-2-ylmethyl)phosphonic acid dimethyl ester. The invention also provides novel acids, esters, and salts of arylmethylphosphonic acid, phosphonic acid and derivatives.
Synthesis of α-Aryldiazophosphonates <i>via</i> a Diazo Transfer Reaction
作者:Irina P. Beletskaya、Igor D. Titanyuk
DOI:10.1021/acs.joc.1c02673
日期:2022.3.4
The simple synthetic procedure for preparation of α-aryl-α-diazophosphonates via a diazotransferreaction is proposed. Benzylphosphonates reacted with tosyl azide (TsN3) in the presence of potassium tert-butoxide (KOtBu) to afford diazophosphonates in a yield up to 79%. The proposed method is general. The reaction uses easily available starting materials, tolerates various functional groups, and may
提出了通过重氮转移反应制备α-芳基-α-重氮膦酸盐的简单合成方法。在叔丁醇钾 (KO t Bu)的存在下,膦酸苄酯与叠氮化甲苯磺酰 (TsN 3 ) 反应得到重氮膦酸酯,产率高达 79%。建议的方法是通用的。该反应使用容易获得的起始材料,耐受各种官能团,可用于数克规模的合成。
Synthesis of benzylic mono(α,α-difluoromethylphosphonates) and benzylic bis(α,α-difluoromethylphosphonates) via electrophilic fluorination
作者:Scott D. Taylor、A.Nicole Dinaut、Avinash N. Thadani、Zheng Huang
DOI:10.1016/0040-4039(96)01847-3
日期:1996.11
A series of benzylicmono(α,α-difluoromethylphosphonates) and benzylicbis(α,α-difluoromethylphosphonates) have been prepared viaelectrophilicfluorination of the corresponding benzylic phosphonates.
Synthesis of Halo-Enol Phostones by Using DMAP-Catalyzed Halocyclization of Alkynylphosphonic Monoesters
作者:Jiale Huang、Haiyang Wang、Ai-Yun Peng
DOI:10.1002/ejoc.201403135
日期:2014.12
A new class of non-benzo halo-enolphostones was synthesized by using a DMAP-catalyzed [DMAP = 4-(dimethylamino)pyridine] halocyclization reaction of 4-pentynylphosphonic monoesters with N-bromosuccinimide (NBS) or N-iodosuccinimide (NIS) in CHCl3 at room temperature. DMAP was critical to the reaction system, as it greatly improved the yields of the desired products. The reaction showed high regioselectivity
Investigation of the Photolysis of Phosphites by Time-Resolved Electron Spin Resonance
作者:Igor V. Koptyug、Naresh D. Ghatlia、Gregory W. Sluggett、Nicholas J. Turro、Srinivasan Ganapathy、Wesley G. Bentrude
DOI:10.1021/ja00142a015
日期:1995.9
The photochemistry of benzyl dimethyl phosphite (BDMPI), p-acetylbenzyl dimethyl phosphite (ABDPI) and 1-naphthylmethyl dimethyl phosphite (NMDPI) has been investigated by continuous wave time-resolved electronspinresonance (ESR) and Fourier transform time-resolved ESR techniques. The analysis of the detected ESR signals and their polarization patterns and temporal evolution elucidates the nature