Cholesterol Synthesis - The Center for Cholesterol Management
... (aliphatic) side chain of 8–10 carbons at the 17 position and a hydroxyl group (-OH) at the 3 position (making it an alcohol). Because of the hydrophilicity at the -OH end and hydrophobicity at the hydrocarbon side chain, sterols can be incorporated into the lipid bilayers of the cytoplasmic membran ...
... (aliphatic) side chain of 8–10 carbons at the 17 position and a hydroxyl group (-OH) at the 3 position (making it an alcohol). Because of the hydrophilicity at the -OH end and hydrophobicity at the hydrocarbon side chain, sterols can be incorporated into the lipid bilayers of the cytoplasmic membran ...
CHM1032 Study Guide for Final Exam (including Details for sections... This study guide is only for additional information not covered... Revised December 3, 2014
... Chapter 16: proteins, classification of proteins and their functions (Table 16.1, p.553), amino acids, peptide bonds, primary structure of proteins, secondary structure, tertiary structure, quaternary structure, denaturation of proteins, causes of denaturation (p. 568-570). enzyme (p.571) is a prote ...
... Chapter 16: proteins, classification of proteins and their functions (Table 16.1, p.553), amino acids, peptide bonds, primary structure of proteins, secondary structure, tertiary structure, quaternary structure, denaturation of proteins, causes of denaturation (p. 568-570). enzyme (p.571) is a prote ...
Document
... Some organic molecules are Chiral. Chiral objects are not identical to their mirror images. Molecules that contain a carbon that is bound to 4 different things are usually chiral. Many important biomolecules (molecules of life) are chiral, including most carbohydrates and amino acids, the building b ...
... Some organic molecules are Chiral. Chiral objects are not identical to their mirror images. Molecules that contain a carbon that is bound to 4 different things are usually chiral. Many important biomolecules (molecules of life) are chiral, including most carbohydrates and amino acids, the building b ...
Worked Example 21.1
... Worked Example 21.4 Identifying Sugars and Sugar Derivatives in Polysaccharides Framycetin, a topical antibiotic, is a four-ring molecule consisting of several aminoglycosides—sugars that have some of the —OH groups on the sugars replaced by —NH2 groups—and another ring, with oxygen links between t ...
... Worked Example 21.4 Identifying Sugars and Sugar Derivatives in Polysaccharides Framycetin, a topical antibiotic, is a four-ring molecule consisting of several aminoglycosides—sugars that have some of the —OH groups on the sugars replaced by —NH2 groups—and another ring, with oxygen links between t ...
effective: september 2003
... given the formulas of two compounds, list the types of intermolecular forces that apply to each molecule, and predict which will have the higher boiling point, or heat of vaporization. ...
... given the formulas of two compounds, list the types of intermolecular forces that apply to each molecule, and predict which will have the higher boiling point, or heat of vaporization. ...
Topics 10 and 20 Outline
... • Use of partial charges (δ+ and δ-) and wedge-dash three-dimensional representations (using tapered bonds as shown below) should be encouraged where appropriate in explaining reaction mechanisms. ...
... • Use of partial charges (δ+ and δ-) and wedge-dash three-dimensional representations (using tapered bonds as shown below) should be encouraged where appropriate in explaining reaction mechanisms. ...
Biochemistry I (CHE 418 / 5418)
... If 2.10 mol N2 and 5.70 mol H2 react, what is the limiting reagent. Ask the question, how many mol of H2 is needed to react with .10 ...
... If 2.10 mol N2 and 5.70 mol H2 react, what is the limiting reagent. Ask the question, how many mol of H2 is needed to react with .10 ...
Practice Final Exam, Chemistry 2220, Organic Chem II 1. Rank the
... 22. Which of these compounds best fits these data? It is soluble in water, and turns red litmus blue; has only one major IR band, at 2950 cm-1, and has the following 1H NMR spectrum: 2.7 ppm, 2H; 2.2 ppm, 6H; 1.0 ppm, 3H. A. N,N-dimethylethanamine B. propanoic acid C. 2-propanol D. 2-methylpropane ...
... 22. Which of these compounds best fits these data? It is soluble in water, and turns red litmus blue; has only one major IR band, at 2950 cm-1, and has the following 1H NMR spectrum: 2.7 ppm, 2H; 2.2 ppm, 6H; 1.0 ppm, 3H. A. N,N-dimethylethanamine B. propanoic acid C. 2-propanol D. 2-methylpropane ...
Organocatalysed asymmetric Mannich reactions
... on proline-catalysed asymmetric Mannich reactions.7 They independently discovered the previously mentioned one-pot three-component proline-catalysed asymmetric Mannich reaction. However, their focus quickly turned to conditions involving preformed imines. For example, in 2002 a highly enantioselecti ...
... on proline-catalysed asymmetric Mannich reactions.7 They independently discovered the previously mentioned one-pot three-component proline-catalysed asymmetric Mannich reaction. However, their focus quickly turned to conditions involving preformed imines. For example, in 2002 a highly enantioselecti ...
Dess-Martin Periodinane
... One of the mildest reagents for the selective oxidation of primary and secondary alcohols to aldehydes and ketones. High yields can be obtained at ambient temperatures, under neutral conditions, in chloroform, dichloromethane or acetonitrile: J. Org. Chem., 48, 4155 (1983); J. Am. Chem. Soc., 113, 7 ...
... One of the mildest reagents for the selective oxidation of primary and secondary alcohols to aldehydes and ketones. High yields can be obtained at ambient temperatures, under neutral conditions, in chloroform, dichloromethane or acetonitrile: J. Org. Chem., 48, 4155 (1983); J. Am. Chem. Soc., 113, 7 ...
The Fischer Indole Synthesis
... Fischer made his first great discovery in 1875 when he was first to successfully synthesize phenylhydrazine by reaction of aniline with potassium hydrogen sulfite. This opened the door to much research on phenylhydrazines, which eventually led to the Fischer indole synthesis. Besides his research i ...
... Fischer made his first great discovery in 1875 when he was first to successfully synthesize phenylhydrazine by reaction of aniline with potassium hydrogen sulfite. This opened the door to much research on phenylhydrazines, which eventually led to the Fischer indole synthesis. Besides his research i ...
8. Chemistry of cooking
... Propanone is a widely used solvent. It can be made from propene. Using full structural formulae show the steps involved in this preparation and name the reagent used in each step. ...
... Propanone is a widely used solvent. It can be made from propene. Using full structural formulae show the steps involved in this preparation and name the reagent used in each step. ...
ppt
... Copyright © J. M. McBride 2010. Some rights reserved. Except for cited third-party materials, and those used by visiting speakers, all content is licensed under a Creative Commons License (Attribution-NonCommercial-ShareAlike 3.0). Use of this content constitutes your acceptance of the noted license ...
... Copyright © J. M. McBride 2010. Some rights reserved. Except for cited third-party materials, and those used by visiting speakers, all content is licensed under a Creative Commons License (Attribution-NonCommercial-ShareAlike 3.0). Use of this content constitutes your acceptance of the noted license ...
Chapter 13. Plannig and Execution of Multistep Synthesis
... Silyl ether plays a very important role as hydroxy-protecting groups. Alcohol can be easily converted to trimethylsilyl (TMS) ethers by reaction with trimethylsilyl chloride in the presence of an amine or by heating with hexamethyldisilazane. t-Butyldimethylsilyl (TBDMS) ethers are also very useful. ...
... Silyl ether plays a very important role as hydroxy-protecting groups. Alcohol can be easily converted to trimethylsilyl (TMS) ethers by reaction with trimethylsilyl chloride in the presence of an amine or by heating with hexamethyldisilazane. t-Butyldimethylsilyl (TBDMS) ethers are also very useful. ...
Workshop 5
... same reaction at a lower temperature. The Pb-C bond energy in (CH3)4Pb is 49 kcal/mol. a. Show the initiation and propagation steps for the chlorination of CH4 using (CH3)4Pb with CH4 and Cl2. Explain why lower temperatures are needed for the halogenation reaction using (CH3)4Pb as the initiator tha ...
... same reaction at a lower temperature. The Pb-C bond energy in (CH3)4Pb is 49 kcal/mol. a. Show the initiation and propagation steps for the chlorination of CH4 using (CH3)4Pb with CH4 and Cl2. Explain why lower temperatures are needed for the halogenation reaction using (CH3)4Pb as the initiator tha ...
Carbohydrates - JU Med: Class of 2019
... Chiral carbon: four different "groups" Chiral carbon in stereoisomers: “stereocenter” Achiral means NOT chiral The possible number of stereoisomers that we can have is 2n(where n is the number of chiral carbons) ...
... Chiral carbon: four different "groups" Chiral carbon in stereoisomers: “stereocenter” Achiral means NOT chiral The possible number of stereoisomers that we can have is 2n(where n is the number of chiral carbons) ...
File
... 17. What are the micro-alloys? Explain with two examples. 18. Half-life period of a radioactive element is 100 seconds. Calculate the disintegration constant and average life period. How much time will it take for 90% decay? 19. (a) Describe the structure and magnetic behaviour of [Ni(CN)4]2– ion on ...
... 17. What are the micro-alloys? Explain with two examples. 18. Half-life period of a radioactive element is 100 seconds. Calculate the disintegration constant and average life period. How much time will it take for 90% decay? 19. (a) Describe the structure and magnetic behaviour of [Ni(CN)4]2– ion on ...
Notes on Chapter 12 Chemical Equilibrium
... c. catalyst = anything that speeds up the rate of reactions by lowering the energy of activation for the reaction. The catalyst is not changed or used up during the chemical reaction. ...
... c. catalyst = anything that speeds up the rate of reactions by lowering the energy of activation for the reaction. The catalyst is not changed or used up during the chemical reaction. ...
Week 6 Solutions - Brown University Wiki
... reactions.$I$would$also$recommend$starting$a$reaction$chart,$where$you$summarize$ each$reaction$and$any$of$its$important$features$(when$doing$this,$it’s$useful$to$go$to$ the$reaction$summary$at$the$end$of$chapter$6—there’s$one$of$these$summaries$at$ the$end$of$each$chapter$going$forward!).$$ ...
... reactions.$I$would$also$recommend$starting$a$reaction$chart,$where$you$summarize$ each$reaction$and$any$of$its$important$features$(when$doing$this,$it’s$useful$to$go$to$ the$reaction$summary$at$the$end$of$chapter$6—there’s$one$of$these$summaries$at$ the$end$of$each$chapter$going$forward!).$$ ...
Reaction types and Stoichiometry
... Al + H2SO4 Al2(SO4)3 + H2 B 2Al + 3H2SO4 Al2(SO4)3 + 3H2 _ C 2Al + 3H2SO4 Al2(SO4)3 + H2 D 2Al + H2SO4 Al2(SO4)3 + H2 20. Which of these is the general formula for a double-replacement reaction? A B C D ...
... Al + H2SO4 Al2(SO4)3 + H2 B 2Al + 3H2SO4 Al2(SO4)3 + 3H2 _ C 2Al + 3H2SO4 Al2(SO4)3 + H2 D 2Al + H2SO4 Al2(SO4)3 + H2 20. Which of these is the general formula for a double-replacement reaction? A B C D ...
Enantioselective synthesis
Enantioselective synthesis, also called chiral synthesis or asymmetric synthesis, is defined by IUPAC as: a chemical reaction (or reaction sequence) in which one or more new elements of chirality are formed in a substrate molecule and which produces the stereoisomeric (enantiomeric or diastereoisomeric) products in unequal amounts.Put more simply: it is the synthesis of a compound by a method that favors the formation of a specific enantiomer or diastereomer.Enantioselective synthesis is a key process in modern chemistry and is particularly important in the field of pharmaceuticals, as the different enantiomers or diastereomers of a molecule often have different biological activity.