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Articles 1 - 16 of 16
Full-Text Articles in Physical Sciences and Mathematics
Isolation Of Thymol From Carom Seeds, Ram Mohan, Leonard Onsen
Isolation Of Thymol From Carom Seeds, Ram Mohan, Leonard Onsen
Ram S. Mohan
A simple protocol for the isolation and characterization of thymol from Trachyspermum ammi, commonly known as Bishop’s weed or carom seed, is reported. Carom seeds are commonly used in Indian cooking as a digestive aid, to treat stomach pain, and for their carminative properties. The protocol, developed as an experiment for introductory organic chemistry laboratories, provides instruction in natural product isolation, chromatographic techniques, acid-base concepts and NMR spectroscopy.
New Methods For Lewis Acid Catalyzed 1,4 Conjugate Addition Of Indole To Chalcones, Ram Mohan, Joseph Krob, '14, Nicholas Lazzara, '16
New Methods For Lewis Acid Catalyzed 1,4 Conjugate Addition Of Indole To Chalcones, Ram Mohan, Joseph Krob, '14, Nicholas Lazzara, '16
Ram S. Mohan
No abstract provided.
Additon Of A Grignard Reagent To Α,Β-Unsaturated Carbonyl Compounds: A Discovery-Oriented Laboratory Experiment For Sophomore Organic Chemistry, Ram Mohan, Meghan Gradle, '15
Additon Of A Grignard Reagent To Α,Β-Unsaturated Carbonyl Compounds: A Discovery-Oriented Laboratory Experiment For Sophomore Organic Chemistry, Ram Mohan, Meghan Gradle, '15
Ram S. Mohan
No abstract provided.
A Comparative Study On The Utility Of Metal Triflates As Catalysts For The Allyation Of Aromatic Acetals And Dioxolanes, Ram Mohan, Dohun Lee, Faculty Advisor, Brendan O'Donnell, '14, Justin Feng, '15
A Comparative Study On The Utility Of Metal Triflates As Catalysts For The Allyation Of Aromatic Acetals And Dioxolanes, Ram Mohan, Dohun Lee, Faculty Advisor, Brendan O'Donnell, '14, Justin Feng, '15
Ram S. Mohan
No abstract provided.
Iron (Iii) Tosylate Catalyzed Synthesis Of Acylals (1,1-Diesters) From Aromatic Aldehydes, Ram Mohan, Anna Nord, '13
Iron (Iii) Tosylate Catalyzed Synthesis Of Acylals (1,1-Diesters) From Aromatic Aldehydes, Ram Mohan, Anna Nord, '13
Ram S. Mohan
No abstract provided.
Iron (Iii) Tosylate Catalyzed Synthesis Of Dihydropyrimidiones And Dihydropyrmidinothiones Via The Biginelli Reaction, Ram Mohan, Jacob Starcevich, '13, Thomas Laughlin, '14
Iron (Iii) Tosylate Catalyzed Synthesis Of Dihydropyrimidiones And Dihydropyrmidinothiones Via The Biginelli Reaction, Ram Mohan, Jacob Starcevich, '13, Thomas Laughlin, '14
Ram S. Mohan
No abstract provided.
Iron (Iii) Tosylate Catalyzed Synthesis Of Dihydrobenzopyrans, Ram Mohan, Stephen Whitfield, '14
Iron (Iii) Tosylate Catalyzed Synthesis Of Dihydrobenzopyrans, Ram Mohan, Stephen Whitfield, '14
Ram S. Mohan
No abstract provided.
Bismuth (Iii) Triflate Catalyzed Synthesis Of Homoallyl Allyl Ethers And Their Reactions, Ram Mohan, Brendan O'Donnell, '14
Bismuth (Iii) Triflate Catalyzed Synthesis Of Homoallyl Allyl Ethers And Their Reactions, Ram Mohan, Brendan O'Donnell, '14
Ram S. Mohan
No abstract provided.
Iron (Iii) Tosylate Catalyzed Acylation Of Alcohols And Phenols, Ram Mohan, Neil Baldwin, '13
Iron (Iii) Tosylate Catalyzed Acylation Of Alcohols And Phenols, Ram Mohan, Neil Baldwin, '13
Ram S. Mohan
No abstract provided.
Environmentally Friendly Organic Synthesis Using Bismuth(Iii) Compounds, Ram Mohan, Scott Krabbe
Environmentally Friendly Organic Synthesis Using Bismuth(Iii) Compounds, Ram Mohan, Scott Krabbe
Ram S. Mohan
Abstract With increasing environmental concerns, the need for environmentally friendly organic synthesis has gained increased importance. In this regard, bismuth (III) compounds are especially attractive as “green” reagents and catalysts for organic synthesis. Bismuth(III) compounds are remarkably nontoxic, relatively air and moisture stable, and easy to handle. The contributions from our laboratory in the last 5 years in the field of applications of bismuth(III) compounds as catalysts are presented.
Applications Of Bismuth(Iii) Compounds In Organic Synthesis, Ram Mohan, Jason Bothwell, Scott Krabbe
Applications Of Bismuth(Iii) Compounds In Organic Synthesis, Ram Mohan, Jason Bothwell, Scott Krabbe
Ram S. Mohan
This review article summarizes the applications of bismuth(III) compounds in organic synthesis since 2002. Although there are an increasing number of reports on applications of bismuth(III) salts in polymerization reactions, and their importance is acknowledged, they are not included in this review. This review is largely organized by the reaction type although some reactions can clearly be placed in multiple sections. While every effort has been made to include all relevant reports in this field, any omission is inadvertent and we apologize in advance for the same (358 references).
Bismuth(Iii) Triflate Catalyzed Allylation Of Cyclic Acetals And Dithianes Followed By In Situ Derivatization To Generate Highly Functionalized Esters, Ram Mohan, Scott Krabbe, Matthew Spafford
Bismuth(Iii) Triflate Catalyzed Allylation Of Cyclic Acetals And Dithianes Followed By In Situ Derivatization To Generate Highly Functionalized Esters, Ram Mohan, Scott Krabbe, Matthew Spafford
Ram S. Mohan
No abstract provided.
The Effect Of Catalyst Of The Reaction Of P-Hydroxybenzaldehyde With Acetic Anhydride: A Discovery-Oriented Green Laboratory Experiment, Ram Mohan, Matthew Huddle, Michael Devore
The Effect Of Catalyst Of The Reaction Of P-Hydroxybenzaldehyde With Acetic Anhydride: A Discovery-Oriented Green Laboratory Experiment, Ram Mohan, Matthew Huddle, Michael Devore
Ram S. Mohan
No abstract provided.
Environmentally Friendly Organic Synthesis Using Bismuth Compounds. Bismuth Trifluoromethanesulfonate-Catalyzed Allylation Of Dioxolanes, Ram Mohan, Matthew Spaffpord, James Christensen, Matthew Huddle, Joshua Lacey
Environmentally Friendly Organic Synthesis Using Bismuth Compounds. Bismuth Trifluoromethanesulfonate-Catalyzed Allylation Of Dioxolanes, Ram Mohan, Matthew Spaffpord, James Christensen, Matthew Huddle, Joshua Lacey
Ram S. Mohan
A bismuth trifluoromethanesulfonate (triflate)-catalyzed (2.0 mol-%) multicomponent reaction involving the allylation of dioxolanes followed by in situ derivatization with anhydrides to generate highly functionalized esters has been developed under solvent-free conditions. Most reagents used to date for allylation of dioxolanes are highly corrosive and are often required in stoichiometric amounts. In contrast, the use of a relatively non-toxic and non-corrosive bismuth(iii)-based catalyst makes this methodology especially attractive for scale-up.
Synthesis Of Homoallyl Ethers Via Allylation Of Acetals And Aldehydes In Ionic Liquids, Ram Mohan, Peter Anzalone
Synthesis Of Homoallyl Ethers Via Allylation Of Acetals And Aldehydes In Ionic Liquids, Ram Mohan, Peter Anzalone
Ram S. Mohan
The TMS triflate catalyzed allylation of acetals to yield homoallyl ethers proceeds smoothly at room temperature in ionic liquids. A one-pot method for the conversion of aldehydes to homoallyl ethers in an ionic liquid has also been developed. This methodology is attractive because it allows allylations to be carried out at room temperature. Ionic liquids offer a convenient replacement for CH2Cl2, the commonly used solvent for such reactions.
Kinetic Deuterium Isotope Effects On The Reactions Of 2-(4-Methoxyphenyl)Oxirane In Water Solutions, Ram Mohan, Victoria Ukachukwu, Dale Whalen
Kinetic Deuterium Isotope Effects On The Reactions Of 2-(4-Methoxyphenyl)Oxirane In Water Solutions, Ram Mohan, Victoria Ukachukwu, Dale Whalen
Ram S. Mohan
The rates of reaction of 2-(4-methoxyphenyl)oxirane (4-methoxystyrene oxide), trans-3-deutereo-2-(4-methoxyphenyl)oxirane and 3,3-dideutereo-2-(4-methoxyphenyl)oxirane in water solutions were measured as functions of pH. Kinetic deuterium isotope effects for the reactions of the mono- and di-deuterated (4-methoxyphenyl)oxiranes were determined for both the acid-catalyzed hydrolysis to diols and the pH-independent reactions leading mostly to rearranged aldehyde and involving a 1,2-hydrogen migration. The inverse kinetic deuterium isotopes for acid-catalyzed hydrolyses of the deuterated (4-methoxyphenyl)oxiranes to diols are consistent with rate-limiting epoxide ring opening. The magnitudes of the normal kinetic deuterium isotope effects on the pH-independent reactions of deuterated 4-methoxyphenyloxiranes are significantly smaller than the deuterium …