Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Raghavakaimal Padmakumar"'
Publikováno v:
Biochemistry. 38:15278-15286
Taurine/alpha-ketoglutarate dioxygenase (TauD), a member of the broad class of non-heme Fe(II) oxygenases, converts taurine (2-aminoethanesulfonate) to sulfite and aminoacetaldehyde while decomposing alpha-ketoglutarate (alphaKG) to form succinate an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9c654bd9d0ba4994bb9cfd4c01152b2
https://doi.org/10.1021/bi9912746
https://doi.org/10.1021/bi9912746
Publikováno v:
Tetrahedron Letters. 39:5151-5154
Zeolite supported zinc borohydride is a versatile catalyst for the regeoselective reduction of epoxides, conjugated ketones, and aldehydes to the corresponding alcohols in good yields.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b18aa8f076066408fe69cc2a27f143f
https://doi.org/10.1016/s0040-4039(98)00984-8
https://doi.org/10.1016/s0040-4039(98)00984-8
Publikováno v:
Synthetic Communications. 28:2071-2075
A convenient method for the synthesis of various azafluorenones (2a-f & 4a-d) by cyclization of substituted arylpyridines (1a-f & 3a-d) using zeolites are described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::085db293c2a891c095f13b2ec12cfa35
https://doi.org/10.1080/00397919808007183
https://doi.org/10.1080/00397919808007183
Autor:
Raghavakaimal Padmakumar, R. Sreekumar
Publikováno v:
Synthetic Communications. 28:1661-1665
A convenient heterogeneous catalytic methodology for the synthesis of Pyrroles and Pyrazoles by an intermolecular reaction of γ or β-diketones with primary amines or hydrazine derivatives over zeolites are described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf2186d294637eeeefd455a1fae81d3c
https://doi.org/10.1080/00397919808006870
https://doi.org/10.1080/00397919808006870
Publikováno v:
Inorganica Chimica Acta. 270:392-398
The Co-C stretching vibration has been identified in resonance Raman spectra of alkyl-cobalamins, via isotope substitution, permitting estimation of the Co-C force constants, f = 1.85, 1.77 and 1.50 mdyn A−1 for methyl-, ethyl- and deoxyadenosyl-co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da4639fb5e213ae9ff012a7f79f90fcd
https://doi.org/10.1016/s0020-1693(97)05994-x
https://doi.org/10.1016/s0020-1693(97)05994-x
Publikováno v:
Tetrahedron Letters. 38:6557-6560
Zeolites, an environmentally attractive solid catalyst, proves to be an efficient catalyst for Michael addition of several 1, 3-dicarbonyl compounds and thiols as donors with methyl vinyl ketone, acrolein and methyl acrylate as acceptors without any
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f8de89612c6b8ef1c3a459b5f21990e
https://doi.org/10.1016/s0040-4039(97)01494-9
https://doi.org/10.1016/s0040-4039(97)01494-9
Autor:
Raghavakaimal Padmakumar, R. Sreekumar
Publikováno v:
Tetrahedron Letters. 38:5143-5146
Potassium permanganate supported on zeolite can be used for the selective oxidation of various enamines, alkylarenes and unsaturated alcohols to the corresponding ketones, in good yield. Arenes were selectively oxidized at the benzylic position. If t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc2c3bc7ce8f9a171c3c4636300c76fa
https://doi.org/10.1016/s0040-4039(97)01096-4
https://doi.org/10.1016/s0040-4039(97)01096-4
Publikováno v:
Tetrahedron Letters. 38:3179-3182
A novel heterogeneous catalytic method to synthesize various heterocyclic compounds of biological interest, aminobenzisothiazole [2a-h] and 1,3-thiazine derivatives [4, 6] , using an environmentally attractive solid catalyst, zeolite, is described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69f097956d619e54ccfd463020a31516
https://doi.org/10.1016/s0040-4039(97)00606-0
https://doi.org/10.1016/s0040-4039(97)00606-0
Autor:
Raghavakaimal Padmakumar, R. Sreekumar
Publikováno v:
Tetrahedron Letters. 38:2413-2416
S-Allyl γ-hydroxy ketene dithioacetals [ 1a–1e ] underwent a rapid and diastereoselective thio-Claisen rearrangement into anti α-allyl β-hydroxy dithioesters [ 2a–2e ] over various zeolites at room temperature in hexane is described. © 1997 E
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e1758a8af512d03de757c50de90048e
https://doi.org/10.1016/s0040-4039(97)00370-5
https://doi.org/10.1016/s0040-4039(97)00370-5
Autor:
R. Sreekumar, Raghavakaimal Padmakumar
Publikováno v:
Synthetic Communications. 27:777-780
A convenient heterogeneous catalytic methodology for Friedel-Crafts acylation of benzene and toluene using various aliphatic carboxylic anhydrides over zeolites at 250 °C is described. An interesting para selectivity is observed in the case of acyla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0081ae56c91ad2ed6fa401727e2a1a96
https://doi.org/10.1080/00397919708004197
https://doi.org/10.1080/00397919708004197