Work-Up-Free Deprotection of Borane Complexes of Phosphines, Phosphites, and Phosphinites with Polymer-Supported Amines

Synlett ◽  
2006 ◽  
Vol 2006 (16) ◽  
pp. 2585-2588 ◽  
Author(s):  
Miquel Pericàs ◽  
Sonia Sayalero
Keyword(s):  
Polymer Supported ◽  
Work Up

Microwave-assisted oxidative coupling of thiols using polystyrene supported bromoderivatives of 2-oxazolidone

2021 ◽  
pp. 096739112110486
Author(s):  
Anjaly Mathew ◽  
Beena Mathew ◽  
Ebey P Koshy
Keyword(s):  
Oxidative Coupling ◽  
Suspension Polymerization ◽  
Aqueous Suspension ◽  
Glycol Diacrylate ◽  
Polymeric Reagent ◽  
Solution Phase Synthesis ◽  
Polystyrene Support ◽  
Polymer Supported ◽  
Normal Laboratory Condition ◽  
Work Up

Polymer-supported reagents have become popular in synthetic organic chemistry over the past decades. But the kinetics of polymer-supported reactions is slow compared to solution phase synthesis because of the poor diffusion of the reactants through the macromolecular polymer matrix. This difficulty can be reduced to a great extent by performing polymer-supported reactions under microwave (MW) conditions. The present work is focussed on the design and development of an innovative, powerful, MW stable and recyclable polymeric reagent prepared by attaching bromoderivative of 2-oxazolidone into the macromolecular matrix of polystyrene. 3% cross-linked polystyrene was prepared by free radical aqueous suspension polymerization technique using tetra ethylene glycol diacrylate as the cross-linking agent and the resulting beads were functionalized by chloromethylation followed by reaction with 2-oxazolidone. Bromine functionality is introduced into the polymer by treating with bromine in carbon tetrachloride. The synthetic utility of the prepared polymeric reagent was demonstrated by the oxidative coupling of thiols to disulfides under MW irradiation. No over oxidation was observed in this protocol and the utilization of polystyrene support simplifies work up and product isolation. The synthesised polymeric reagent displayed good cyclic stability up to five cycles without any substantial decrease in bromine content and satisfactory storage stability under normal laboratory condition. Moreover this may be the first report that uses MW energy for the oxidation of thiols to disulfides using polymer-supported reagents. [Formula: see text]

Thorough Work-Up Crucial in Sarcoidosis Cases

2012 ◽  
Vol 43 (6) ◽  
pp. 26
Author(s):  
DOUG BRUNK
Keyword(s):  
Work Up

Neuropsychiatric Work-Up Same for SLE Patient

2011 ◽  
Vol 44 (1) ◽  
pp. 30
Author(s):  
DIANA MAHONEY
Keyword(s):  
Work Up

Bedeutung der allergologischen Abklärung bei Asthma und COPD

2014 ◽  
Vol 71 (5) ◽  
pp. 267-274
Author(s):  
Judith A. Schneider Spence ◽  
Andreas J. Bircher ◽  
Kathrin Scherer Hofmeier
Keyword(s):  
Respiratory Disease ◽  
Asthma Bronchiale ◽  
Aspirin Exacerbated Respiratory Disease ◽  
Work Up

Während eine allergologische Abklärung im Work-Up eines Asthma bronchiale inbegriffen sein sollte, wird die chronisch obstruktive Pneumopathie nicht spontan mit einer atopischen Diathese in Zusammenhang gebracht. Anamnese, Klinik, das Vorhandensein weiterer atopischer Krankheiten sowie Prickteste und die serologische Messung von spezifischen IgE-Antikörpern geben Hinweise auf eine allergische Genese einer akuten oder chronischen Lungenkrankheit. Der Stickoxidwert in der Ausatemluft (FeNO-Messung) kann durch die Infiltration von Eosinophilen in die Bronchialwand beim allergischen Phänotyp des Asthma bronchiale erhöht sein (TH2-gewichteter Phänotyp). Eine Abhängigkeit der Beschwerden vom Arbeitsplatz muss evaluiert werden. Neben dem allergischen Typ des Asthma bronchiale soll auch an eine Aspirin-exacerbated-respiratory disease (AERD) gedacht werden. Aufgrund der überlappenden pathophysiologischen Grundlagen und der Symptomatik zwischen Asthma bronchiale und der chronisch obstruktiven Pneumopathie ist die Zuweisung zum Allergologen allenfalls auch bei einem COPD-Patienten indiziert.

Extensive Work-Up for IBS Rarely Needed

2010 ◽  
Vol 38 (3) ◽  
pp. 42
Author(s):  
NANCY WALSH
Keyword(s):  
Work Up

Guideline for radioimmunotherapy of rituximab relapsed or refractory CD20+ follicular B-cell nonHodgkin´s lymphoma

2004 ◽  
Vol 43 (05) ◽  
pp. 171-176 ◽  
Author(s):  
T. Behr ◽  
F. Grünwald ◽  
W. H. Knapp ◽  
L. Trümper ◽  
C. von Schilling ◽  
...  
Keyword(s):  
Quality Control ◽  
Quality Management ◽  
Medical Physics ◽  
Essential Elements ◽  
Background Information ◽  
After Care ◽  
Complete Treatment ◽  
Close Cooperation ◽  
Work Up

Summary:This guideline is a prerequisite for the quality management in the treatment of non-Hodgkin-lymphomas using radioimmunotherapy. It is based on an interdisciplinary consensus and contains background information and definitions as well as specified indications and detailed contraindications of treatment. Essential topics are the requirements for institutions performing the therapy. For instance, presence of an expert for medical physics, intense cooperation with all colleagues committed to treatment of lymphomas, and a certificate of instruction in radiochemical labelling and quality control are required. Furthermore, it is specified which patient data have to be available prior to performance of therapy and how the treatment has to be carried out technically. Here, quality control and documentation of labelling are of greatest importance. After treatment, clinical quality control is mandatory (work-up of therapy data and follow-up of patients). Essential elements of follow-up are specified in detail. The complete treatment inclusive after-care has to be realised in close cooperation with those colleagues (haematology-oncology) who propose, in general, radioimmunotherapy under consideration of the development of the disease.

Surgery for Skull Base Malignancies-Preoperative Work-Up to Minimize Complications

Skull Base ◽  
2008 ◽  
Vol 18 (S 01) ◽  
Author(s):  
Andrew King ◽  
Stephen MacNally ◽  
Jarod Homer ◽  
Richard Ramsden ◽  
Shakeel Saeed ◽  
...  
Keyword(s):  
Skull Base ◽  
Preoperative Work Up ◽  
Work Up

Rapidly progressive glomerulonephritis as presenting feature of systemic lupus erythematosus in a Bangladeshi male patient: a rare case report

2020 ◽  
Vol 10 (2) ◽  
pp. 137-138
Author(s):  
Samiha Haque ◽  
Ishrat Jahan ◽  
Tufayel Ahmed Chowdhury ◽  
Muhammad Abdur Rahim ◽  
Mehruba Alam Ananna ◽  
...  
Keyword(s):  
Systemic Lupus Erythematosus ◽  
Lupus Erythematosus ◽  
Venous Pressure ◽  
Rapidly Progressive Glomerulonephritis ◽  
Initial Response ◽  
Systemic Lupus ◽  
Renal Manifestation ◽  
Rare Case Report ◽  
Diagnostic Work ◽  
Work Up

Rapidly progressive glomerulonephritis is one of the most dramatic and tragic presentations of lupus nephritis (LN) or renal manifestation of systemic lupus erythematosus (SLE). A 35-year-old Bangladeshi gentleman presented with worsening oedema, scanty, high colored, frothy urine and deteriorating renal function. He had puffy face, anaemia, oedema, normal jugular venous pressure (JVP), high blood pressure (150/90 mm Hg), ascites and bilateral pleural effusions. Diagnostic work-up confirmed SLE with class IV LN. His initial response to specific therapy showed improvement Birdem Med J 2020; 10(2): 137-138

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