01414nas a2200241   4500008004100000022001400041245009900055210006900154260010600223300001400329490000700343520046900350653003000819653001900849653002300868653002500891653002400916100003200940700002600972700002600998700002201024856012601046       2009                        eng d  a0040-403900aTitanium superoxide: a heterogeneous catalyst for anti-Markovnikov aminobromination of olefins0 aTitanium superoxide a heterogeneous catalyst for antiMarkovnikov  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJUN  a2815-28170 v503 a<p>A new facile procedure for the aminobromination of olefins in high yields has been described using p-toluene sulfonamide (p-TsNH(2)) and N-bromosuccinimide (NBS) as introgen and bromine sources, respectively, and titanium superoxide as a truly heterogeneous catalyst. The formation of anti-Markovnikov product exclusively in all the cases studied possibly proceeding I free radical reaction pathway is remarkable. (C) 2009 Elsevier Ltd. All rights reserved.</p>10aanti-Markovnikov addition10aBromoamination10aN-Bromosuccinimide10ap-Toluenesulfonamide10aTitanium superoxide1 aShaikh, Tanveer, Mahamadali1 aKarabal, Pratibha, U.1 aSuryavanshi, Gurunath1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/titanium-superoxide-heterogeneous-catalyst-anti-markovnikov-aminobromination-olefins-001343nas a2200253   4500008004100000022001400041245006800055210006500123260010600188300001400294490000700308520045200315653001800767653001700785653002000802653001100822653002500833100002600858700003200884700002400916700002600940700002200966856010100988       2010                        eng d  a0040-403900aNaIO4/LiBr-mediated aziridination of olefins using chloramine-T0 aNaIO4LiBrmediated aziridination of olefins using chloramineT  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcDEC  a6460-64620 v513 a<p>A new milder protocol for aziridination of a variety of olefins has been described. The process employs catalytic amount of sodium metaperiodate (NaIO4) as an oxidant and LiBr and chloramine-T as the bromine and nitrogen sources, respectively. Interestingly, the formation of aziridine products in all the cases studied takes place presumably through a process of 1,2-aminobromination of alkenes. (C) 2010 Elsevier Ltd. All rights reserved.</p>10aAziridination10aChloramine-T10aLithium bromide10aOlefin10aSodium metaperiodate1 aKarabal, Pratibha, U.1 aChouthaiwale, Pandurang, V.1 aShaikh, Tanveer, M.1 aSuryavanshi, Gurunath1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/naio4libr-mediated-aziridination-olefins-using-chloramine-t-001679nas a2200277   4500008004100000022001400041245011500055210006900170260007500239300001000314490000700324520067300331653002201004653002101026653002701047653001401074653002401088100002001112700003201132700001701164700002601181700002001207700002601227700002201253856012601275       2010                        eng d  a1571-101300aNovel synthesis and characterization of titanium superoxide and its application in organic oxidative processes0 aNovel synthesis and characterization of titanium superoxide and   a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER/PLENUM PUBLISHERScMAR  a21-320 v143 a<p>A novel, exceptionally stable titanium superoxide radical ion was prepared and its structure determined by FTIR, ESR, Raman spectroscopy, X-ray diffraction, thermogravimetric/differential thermal analysis and elemental analysis. This heterogeneous catalyst has been found to be effective for the selective oxidation of aromatic amines and phenols to the corresponding nitro aromatics and p-quinones, respectively. In addition, this non-toxic, inexpensive and reusable catalyst has also been used in aminobromination of olefins, which proceed to give the 1, 2-bromoaminated anti-Markovnikov product. A brief account of these results is summarized in this review.</p>10aAmino Bromination10aAnti-Markovnikov10aheterogeneous catalyst10aOxidation10aTitanium superoxide1 aReddy, Santhosh1 aShaikh, Tanveer, Mahamadali1 aRawat, Varun1 aKarabal, Pratibha, U.1 aDewkar, Gajanan1 aSuryavanshi, Gurunath1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/novel-synthesis-and-characterization-titanium-superoxide-and-its-application-organic-001222nas a2200229   4500008004100000022001400041245014600055210006900201260007500270300001400345520031500359653001200674653001100686653002000697653002000717653001900737100003200756700002600788700002600814700002200840856013000862       2010                        eng d  a0039-788100aRegiospecific azidoiodination of alkenes with sodium periodate, potassium iodide, and sodium azide: a high-yield synthesis of beta-iodoazides0 aRegiospecific azidoiodination of alkenes with sodium periodate p  aRUDIGERSTR 14, D-70469 STUTTGART, GERMANYbGEORG THIEME VERLAG KGcNOV  a3879-38823 a<p>The combination of sodium periodate, potassium iodide, and sodium azide has been found to be an efficient, simple, and inexpensive reagent system for azidoiodination of alkenes. The regiospecific 1,2-azidoiodination proceeds in an anti-Markovnikov fashion to produce beta-iodoazides in excellent yields.</p>10aalkenes10aazides10aazidoiodination10abeta-iodoazides10aregio-specific1 aChouthaiwale, Pandurang, V.1 aKarabal, Pratibha, U.1 aSuryavanshi, Gurunath1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/regiospecific-azidoiodination-alkenes-sodium-periodate-potassium-iodide-and-sodium-azide-001271nas a2200241   4500008004100000022001400041245009400055210006900149260010600218300001400324490000700338520036200345653001200707653001700719653002100736653002100757653002100778100002500799700002600824700003200850700002200882856012500904       2012                        eng d  a0040-403900aNaIO4-NaN3-mediated diazidation of styrenes, alkenes, benzylic alcohols, and aryl ketones0 aNaIO4NaN3mediated diazidation of styrenes alkenes benzylic alcoh  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAUG  a4195-41980 v533 a<p>Sodium periodate and sodium azide combination has been found to be an excellent reagent system suitable for the direct diazidation of styrenes, alkenes, benzylic alcohols, and aryl ketones to produce the corresponding vicinal and geminal diazides respectively in high yields under mild reaction conditions. (C) 2012 Elsevier Ltd. All rights reserved.</p>10aalkenes10aAryl ketones10aGeminal diazides10aSodium periodate10aVicinal diazides1 aKamble, Dayanand, A.1 aKarabal, Pratibha, U.1 aChouthaiwale, Pandurang, V.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/naio4-nan3-mediated-diazidation-styrenes-alkenes-benzylic-alcohols-and-aryl-ketones-001256nas a2200169   4500008004100000022001400041245018300055210006900238260011000307300001400417490000700431520043900438100003000877700002600907700002200933856013100955       2013                        eng d  a1477-052000aOptically pure gamma-butyrolactones and epoxy esters via two stereocentered HKR of 3-substituted epoxy esters: a formal synthesis of (-)-paroxetine, Ro 67-8867 and (+)-eldanolide0 aOptically pure gammabutyrolactones and epoxy esters via two ster  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a1280-12850 v113 a<p>The HKR of racemic anti- or syn-3-substituted epoxy esters catalyzed by a Co(III)salen complex provides ready access to the corresponding enantioenriched 3,4-disubstituted gamma-butyrolactones and 3-substituted epoxy esters. This strategy has been successfully employed in the formal synthesis of biologically active 3,4-disubstituted piperidine derivatives, (-)-paroxetine and Ro 67-8867 and a natural product, (+)-eldanolide.</p>1 aDevalankar, Dattatray, A.1 aKarabal, Pratibha, U.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/optically-pure-gamma-butyrolactones-and-epoxy-esters-two-stereocentered-hkr-3-substituted-001237nas a2200169   4500008004100000022001400041245018500055210006900240260011000309300001400419490000700433520042500440100002600865700002500891700002200916856012900938       2014                        eng d  a1477-052000aCo(III)(salen)-catalyzed phenolic kinetic resolution of two stereocentered benzyloxy and azido epoxides: its application in the synthesis of ICI-118,551, an anti-hypertensive agent0 aCoIIIsalencatalyzed phenolic kinetic resolution of two stereocen  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB  a2349-23550 v123 a<p>The salen Co(III)-catalyzed phenolic kinetic resolution of racemic anti- or syn-azido and benzyloxy epoxides provides a practical route to a range of enantioenriched anti-or syn-1-aryloxy-3-azido or benzyloxy-2-alcohols in excellent yields and ees. The synthetic potential of this protocol is illustrated with an enantioselective synthesis of ICI-118,551, a beta-blocker, in a highly optically pure form (99% ee).</p>1 aKarabal, Pratibha, U.1 aKamble, Dayanand, A.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/coiiisalen-catalyzed-phenolic-kinetic-resolution-two-stereocentered-benzyloxy-and-azido-001284nas a2200229   4500008004100000022001400041245008300055210006900138260008600207300001400293490000700307520045600314653002500770653001600795653002300811653002100834653002000855100001600875700002600891700002200917856011500939       2015                        eng d  a0039-791100aConcise enantioselective synthesis of naturally active (S)-3-hydroxypiperidine0 aConcise enantioselective synthesis of naturally active S3hydroxy  a530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcAPR  a1559-15650 v453 a<p>A short and efficient enantioselective synthesis of natural product (S)-3-hydroxypiperidine has been achieved starting from commercially available raw materials employing two catalytic routes: (i) cocatalyzed hydrolytic kinetic resolution (HKR) of racemic methyl-3-(oxiran-2-yl)propanoate; (ii) proline-catalyzed -aminooxylation followed by Horner-Wardsworth-Emmons olefination in high enantiomeric purity (97% ee) and high overall yield (38%).</p>10aAsymmetric synthesis10abioactivity10aEnantioselectivity10aNatural products10aorganocatalysis1 aDey, Soumen1 aKarabal, Pratibha, U.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/concise-enantioselective-synthesis-naturally-active-s-3-hydroxypiperidine-0