Search Results - "Syam Kumar, U.K."

Aromatic and heteroaromatic annelation studies on 3-[bis(methylthio)methylene]-1-methyloxindole: synthesis of carbazoles and an efficient route to pyrido[2,3- b]indoles by Suresh, J.R, Syam Kumar, U.K, Ila, H, Junjappa, H

“…The 3-[bis(methylthio)methylene]-1-methyloxindole ( 2) is shown to undergo cycloaromatization with allyl and methallyl magnesium chlorides to afford…”
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Synthesis of tetrahedral diarylheptanoid ent-diospongin A and epimer-diospongin B by employing Julia–Kocienski olefination by Meruva, Suresh Babu, Mekala, Ramamohan, Raghunadh, Akula, Raghavendra Rao, K., Dahanukar, Vilas H., Pratap, T.V., Syam Kumar, U.K., Dubey, P.K.

“…Total synthesis of ent-diospongin A and epimer-diospongin B has been accomplished in good yield with high optical purity. The key steps of diospongin synthesis…”
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A short diastereoselective synthesis of cis-(2S,4S) and cis-(2R,4R)-4-hydroxyprolines by Gajare, Vikas S., Khobare, Sandip R., Malavika, B., Rajana, Nagaraju, Venkateswara Rao, B., Syam Kumar, U.K.

“…[Display omitted] A concise synthesis of (2R,4R)-4-hydroxyproline (1) and (2S,4S)-4-hydroxyproline (2) has been developed in enantiomerically pure form from…”
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One pot oxidative dehydration - oxidation of polyhydroxyhexanal oxime to polyhydroxy oxohexanenitrile: A versatile methodology for the facile access of azasugar alkaloids by Khobare, Sandip R., Gajare, Vikas, Reddy, E. Vishnuvardhan, Datrika, Rajender, Banda, Malavika, Siddaiah, Vidavalur, Pachore, Sharad S., Timanna, Upadhya, Dahanukar, Vilas H., Syam Kumar, U.K.

“…A unique oxidative dehydration-oxidation of polyhydroxy-oxime (7) to the corresponding ketonitrile (8) in one pot is reported for the first time in…”
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Diversity oriented concise asymmetric synthesis of azasugars: a facile access to l-2,3-trans-3,4-cis-dihydroxyproline and (3S,5S)-3,4,5-trihydroxypiperidine by Gajare, Vikas S., Khobare, Sandip R., Datrika, Rajender, Reddy, K. Srinivas, Rajana, Nagaraju, Kumar, Sarvesh, Venkateswara Rao, B., Syam Kumar, U.K.

“…[Display omitted] Diversity oriented concise asymmetric syntheses of l-2,3-trans-3,4-cis-dihydroxyproline and (3S,5S)-3,4,5-trihydroxypiperidine have been…”
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An efficient regioselective copper catalyzed multi-component synthesis of 1,3-disubstituted pyrazoles by Raghunadh, Akula, Meruva, Suresh Babu, Mekala, Ramamohan, Raghavendra Rao, K., Krishna, Thalishetti, Gangadhara Chary, R., Vaikunta Rao, L., Syam Kumar, U.K.

“…An efficient synthesis of unsymmetrically substituted 1,3-pyrazole derivatives has been developed via three-component coupling reaction involving…”
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Diastereoselective total synthesis of piperidine alkaloids: (2R,5R)-5-hydroxyhomopipecolic acid and (2R,5R,8R)-5-hydroxysedamine by Khobare, Sandip R., Gajare, Vikas S., Rajana, Nagaraju, Datrika, Rajender, Srinivasa Reddy, K., Syam Kumar, U.K., Siddaiah, Vidavalur

“…[Display omitted] Total synthesis of 2,5-disubstituted piperidine alkaloids, 5-hydroxyhomopipecolic acid (1) and 5-hydroxysedamine (2) was accomplished in…”
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A concise stereoselective synthesis of (+)-1-deoxy-6-epi-castanospermine by Gajare, Vikas S., Khobare, Sandip R., Datrika, Rajender, Reddy, K. Srinivasa, Rajana, Nagaraju, Babu, B. Kishore, Rao, B. Venkateswara, Syam Kumar, U.K.

“…[Display omitted] •The stereoselective imine reduction was achieved by using sodium cyanoborohydride.•Mitsunobu cyclization selectively with primary…”
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Diastereoselective total synthesis of 3,6-disubstituted piperidine alkaloids, (3R,6S)-epi-pseudoconhydrine and (3R,6R)-pseudoconhydrine by Khobare, Sandip R., Gajare, Vikas S., Jammula, Subbarao, Syam Kumar, U.K., Murthy, Y.L.N.

“…Diastereoselective total synthesis of 3,6-disubstituted piperidine alkaloids, epi-pseudoconhydrine (1) and pseudoconhydrine (2) has been developed starting…”
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1-Bis(methoxy)-4-bis(methylthio)-3-buten-2-one: useful three carbon synthon for synthesis of five and six membered heterocycles with masked (or unmasked) aldehyde functionality by Mahata, Pranab K, Syam Kumar, U.K, Sriram, V, Ila, H, Junjappa, H

“…1-Bis(methoxy)-4-bis(methylthio)-3-buten-2-one has been shown to be a useful three carbon synthon for efficient regiospecific synthesis of a variety of five…”
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Synthesis and reactions of 2-bis(methylthio)methylene-1-methyl-3-oxoindole: A facile access to benzo- and heterocyclo-fused carbazoles and indoles by Rao, M.V.Basaveswara, Syam Kumar, U.K, Ila, H, Junjappa, H

“…The synthesis and reactions of 2-bis(methylthio)methylene-1-methyl-3-oxoindole 5 as a novel 3-carbon 1,3-bielectrophilic component are described. Thus…”
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