Zuschriften Chemie

DMF concentrations of up to 30%donot significantly affect reaction rate (Figure 5B) thus the 18%residual DMF achieved by solvent exchange was sufficient To further prove the concept apacked-bed column with iron was operated in continuous mode initially using amodel solution of 0 05m 2 in 82%EtOH and 18%DMF The flow rate

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Instructions for Amino PEG Reagents

Instructions for Amino PEG Reagents No coupling reagent is required The PEG amine can perform efficient PEGylation with NHS ester at pH 7-9 1) Slowly dissolve amine bearing small molecules in organic solvents such as DMF CH 2 Cl 2 DMSO THF or other solvents as needed

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Simple Accordion with CSS jQuery by Soh Tanaka

After stirring for 1 h anhydrous DMF (7 6 g 8 0 mL 0 99 mol 3 18 19 we developed an inexpensive and facile synthesis based on the lithiation of 2 13 and subsequent quenching with DMF After acidic workup aldehyde 3 is isolated in good yields by recrystallization In combination with the synthesis of 2 described above the preparation of 3 is efficiently conducted on a 10-15 g

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Richter Masterpieces in Process Chemistry II Group Meeting

Richter Masterpieces in Process Chemistry II1/11/06 Group Meeting Vitamin D Analogs: Me OH Me MeOH H Me H HO calcitriol Me Me H HO Me MeOH R Me Me Me H Me H HO Me vitamin D2 Gadamasetti Process Chemistry in the Pharmaceutical Industry Pages 73 89 JOC 1995 60 6574 1 SO2 2 TBSCl 97% Me Me Me H Me H TBSO Me SO2 1 O3 DCM/ MeOH 10

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Photoinduced decarboxylative borylation of carboxylic

Boron substituents provide versatile reactivity and their utility has been emerging in pharmaceutical contexts Fawcett et al show that visible light can induce replacement of carboxylic acid groups with boronate esters which will ease their introduction into a wide variety of compounds Once the acids are activated with phthalimide substituents they can react with catecholborane dimers

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CHEM 344 Summer 2014 Midterm Quiz (100 pts)

2 1) A mixture of 0 5 g (5 1 mmol) of potassium acetate 1 mL 9 3 mmol 3= 1 276 g/cm of 1-bromobutane and 3 mL of N N-dimethylformamide (DMF = 0 949 g/cm3) and a few boiling chips were added to a 5-mL round-bottom flask equipped with a reflux condenser

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Simultaneous rapid reaction workup and catalyst recovery

10/29/2016Simultaneous rapid reaction workup and catalyst recovery Green Chem 2016 18 5769-5772 DOI: 10 1039/C6GC02448C Communication Zhichao Lu Zofia Hetman Gerald B Hammond Bo Xu By combining reaction work-up and catalyst recovery into a simple filtration procedure we have developed a substantially faster technique for organic synthesis By combining reaction work-up and

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デス・マーチン Dess

H 2 O (10 μL 0 55 mmol) をCH 2 Cl 2 (10 mL)にえてピペットでいすことをりし、wet CH 2 Cl 2 をする。 2-フェニルシクロヘキサノール(88 4 mg 0 502 mmol)およびDMP (321mg、0 502 mmol)の dry CH 2 Cl 2 (3 mL)に、でwet CH 2 Cl 2 をゆっくりえる。 なは、およそ30の

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Vilsmeier–Haack reaction

The Vilsmeier–Haack reaction (also called the Vilsmeier reaction) is the chemical reaction of a substituted amide (1) with phosphorus oxychloride and an electron-rich arene (3) to produce an aryl aldehyde or ketone (5) The reaction is named after Anton Vilsmeier and Albrecht Haack For example benzanilide and dimethylaniline react with phosphorus oxychloride to produce an unsymmetrical

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Photoinduced decarboxylative borylation of carboxylic

7/21/2017Boron substituents provide versatile reactivity and their utility has been emerging in pharmaceutical contexts Fawcett et al show that visible light can induce replacement of carboxylic acid groups with boronate esters which will ease their introduction into a wide variety of compounds Once the acids are activated with phthalimide substituents they can react with catecholborane dimers

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Workup

2020 Alison Frontier University of Rochester Supported by a grant from the National Science Foundation NSF Funding {+} This material is based upon work supported by the National Science Foundation under Grant Number CHE-1565813 Any opinions findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect

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Phase

The advantages of using PTC include use of inexpensive and easy-to-workup inorganic bases reduction of organic solvents avoidance of DMF and DMSO simplification of experiments improvement of reactivity and suppression of side reactions all of which are important especially on large scales PTC's are therefore considered a promising technology from green chemistry point of view

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Cleavage Deprotection and Isolation of Peptides after

Cleavage Deprotection and Isolation of Peptides after Fmoc Synthesis Cleavage and deprotection is one of the most crucial Potential Problems steps in peptide synthesis The treatment of a peptidyl- resin with a cleavage cocktail is not one simple reaction but a series of competing reactions Unless suitable reagents and reaction conditions are selected the peptide can be irreversibly

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Skin Diseases: Gerdes S

Until recently only a mixture of dimethyl fumarate (DMF) and three salts of ethyl hydrogen fumarate was available However a drug containing DMF as the sole ingredient was registered for the same indication in 2017 This prospective study aimed to investigate the switch from the currently used FAE mixture to DMF

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Copyright Wiley

Extractive workup refers to partitioning of the crude reaction between an organic solvent and water phase separation drying (Na 2 SO 4 or MgSO 4) and evaporation under reduced pressure The saturated aqueous NH 4 Cl solution was adjusted to pH 8 by addition of NH 4 OH All reactions were carried out under Ar

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ジメチル

ジメチル(りゅうさんジメチル、dimethyl sulfate)は (CH 3 O) 2 SO 2 でされるで、のジメチルエステル。 をせずに (CH 3) 2 SO 4 あるいは Me 2 SO 4 ともする。 なメチルとしてでくわれるのひとつで、の、アルコールをに

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Supplemental Section

Workup was carried out as described for the chloromethyl ketone synthesis Chloromethyl ketones 2a (glycine) 2c (leucine) 2d (lysine) 2e (aspartic acid) were obtained as a white solid (quantitative yield) and the bromomethyl The resin was presolvated with DMF for 30 min and another 30

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