CuI-Mediated Cross-Coupling of Aryl Halides with Oximes: A Direct Access to O-Aryloximes (2007)
De, Prithwiraj, Nonappa, *, Pandurangan, Komala, Maitra, Uday, Wailes, Steve
The first Cu-catalyzed cross-coupling of aromatic oximes and haloarenes is reported. This one-step formation of the =N-O-Ar linkage gives access to a range of oxime ethers in good to moderate yields.
During the past decade, the study of molecular self-assembly and network formation from small molecule gelators has become one of the most active areas of supramolecular chemistry. A serendipitous...
The first chemical synthesis of pythocholic acid, a major component of python’s bile, and $3\alpha$,$7\alpha$,$12\alpha$,$16\alpha$-tetrahydroxy-$5\beta$-cholan-24-oic acid...
Unusual gelation of a number of organic solvents by allyl cholate and other simple esters of cholic acid is reported. These gels were characterized by SEM, AFM, polarizing optical microscopy (POM),...
Nanoparticle-Gel Hybrid Material Designed with Bile Acid Analogues (2006)
There is considerable interest in research directed toward the tailoring of metal nanoparticles (NPs) due to their futuristic applications. Surface functionalized metal NPs have been used for a...
Use of novel cationic bile salts in cholesterol crystallization and solubilization in vitro (2006)
Bhat, Shreedhar, Leikin-Gobbi, Diana, Konikoff, Fred M, Maitra, Uday
Unnatural bile salts have been synthesized with a cationic group at the side chain of natural bile acids. These cationic bile salts aggregate in water and aqueous salt solutions in a manner similar...
Kalyanikutty, KP, Nikhila, M, Maitra, Uday, Rao, CNR
By carrying out the reaction of appropriate metal compounds with $Na_2S$ in the presence of a tripodal cholamide-based hydrogel, nanotubes and nanorods of CdS, ZnS and CuS have been obtained. The...
Ghosh, Sanjib, Choudhury, Angshuman Roy, Row, Tayur Guru N, Maitra, Uday
A novel cholaphane has been synthesized from a naturally occurring bile acid in just two steps. It has an ability to bind two fluoride ions selectively utilizing the glycolate motif in chloroform....
Terech, Pierre, Sangeetha, Neralagatta M, Deme, Bruno, Maitra, Uday
Aqueous gels derived from three cationic 24-nor 3,12-dihydroxy cholane (DC) derivatives with N-methyl-2-pyrrolidinone (NMP), N-methylmorpholine (NMM), and 1,4-diazabicyclo[2.2.2]octane (DABCO) at the...
A Simple Construction of a Bile Acid Based Dendritic Light Harvesting System (2005)
A facile synthesis of a cholic acid derived dendritic structure labeled with nine naproxens and a single anthracene is reported. This multichromophoric, novel dendritic construct acts as an efficient...
Synthesis and in vitro cholesterol dissolution by 23- and 24-phosphonobile acids (2005)
A new class of 23- and 24-phosphonobile acids have been synthesized from bile acid and their in vitro cholesterol-dissolving efficiency have been estimated. 24-Phosphonobile salts (PBSs) are slightly...
Supramolecular gels: Functions and uses (2005)
Sangeetha, Neralagatta M, Maitra, Uday
In recent years there has been immense interest in studying gels derived from low molecular mass gelators (supramolecular, or simplymolecular gels). The motivation for this is not only to understand...
Micellar aggregates and hydrogels from phosphonobile salts (2005)
Babu, Ponnusamy, Chopra, D, Row, Guru TN, Maitra, Uday
The aggregation properties of novel bile acid analogs-phosphonobile salts (PBS)-have been studied. The critical micellar concentration of 23 and 24-phosphonobile salts were measured using...
Hydroxyl-Terminated Dendritic Oligomers from Bile Acids: Synthesis and Properties (2005)
Vijayalakshmi, N, Maitra, Uday
The high reactivity of the chloroacetyl group has been exploited for the synthesis of bile acid based first and second generation dendrons with multiple hydroxyl groups. The synthesis involves only a...
Structure and Dynamics of a Molecular Hydrogel Derived from a Tripodal Cholamide (2004)
Mukhopadhyay, Samrat, Maitra, Uday, Ira, *, Krishnamoorthy, Guruswamy, Schmidt, Judith, Talmon, Yeshayahu
Tripodal cholamide 1 is a supergelator of aqueous fluids. A variety of physical techniques, including cryo-transmission electron microscopy (TEM), circular dichroism (CD), steady-state fluorescence,...
Chemistry and biology of bile acids (2004)
Mukhopadhyay, Samrat, Maitra, Uday
This review makes an attempt to combine the insights gained into the biochemistry and physiology of bile acids with the elegant supramolecular systems designed from them. Bile acids are...
Sangeetha, Neralagatta M, Bhat, Shreedhar, Choudhury, Angshuman R, Maitra, Uday, Terech, Pierre
A new class of cationic bile acid derivatives was synthesized to gel water and aqueous electrolyte solutions. Investigations on these hydrogels are carried out at different length scales by a...
Mukhopadhyay, Samrat, Maitra, Uday
Avicholic acid, a major constituent of the bile of several avian species, was synthesized in eight steps from readily available chenodeoxycholic acid in 9% overall yield using Breslow’s remote...
Pyrene-Derived Novel One- and Two-Component Organogelators (2003)
Babu, P, Sangeetha, NM, Vijaykumar, P, Maitra, Uday, Rissanen, Kari, Raju, AR
A new class of alkyl-chain-appended pyrene derivatives 4-14 were synthesized and evaluated for their gelation abilities. Depending on the nature of the linking group, these compounds gelated a number...
A new bile acid-derived lariat-ether: Design, synthesis and cation binding properties (2003)
A new chola lariat ether (1, a 21-crown-6) was constructed from readily available precursors. The association constant of compound 1 with alkali metal picrates was measured using Cram’s extraction...
Maitra, Uday, Mukhopadhyay, Samrat, Sarkar, Arnab, Rao, Photon, Indi, SS
Studies on aqueous and organogels derived from low molecular mass species have been of considerable interest in recent years because of the many potential applications envisaged.[1] While gel...
Design and Synthesis of Novel Chiral Dendritic Species Derived from Bile Acids (2001)
Balasubramanian, R, Maitra, Uday
Bile acids have been used for the first time as the building block for the construction of dendritic units. Orthogonally functionalized 7-deoxycholic and cholic acid derivatives were synthesized. The...
Typescript (photocopy).