@article { ISI:000276963200003, title = {Novel synthesis and characterization of titanium superoxide and its application in organic oxidative processes}, journal = {Catalysis Surveys from Asia}, volume = {14}, number = {1}, year = {2010}, month = {MAR}, pages = {21-32}, publisher = {SPRINGER/PLENUM PUBLISHERS}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

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.

}, keywords = {Amino Bromination, Anti-Markovnikov, heterogeneous catalyst, Oxidation, Titanium superoxide}, issn = {1571-1013}, doi = {10.1007/s10563-010-9085-5}, author = {Reddy, R. Santhosh and Shaikh, Tanveer Mahamadali and Rawat, Varun and Karabal, Pratibha U. and Dewkar, Gajanan and Suryavanshi, Gurunath and Sudalai, Arumugam} } @article {47102, title = {Visible-light-induced controlled oxidation of N-substituted 1,2,3,4-tetrahydroisoquinolines for the synthesis of 3,4-dihydroisoquinolin-1(2h)-ones and isoquinolin-1(2H)-ones}, journal = {Advanced Synthesis \& Catalysis}, volume = {363}, year = {2021}, month = {MAR }, pages = {1390-1400}, type = {Article}, abstract = {

A visible light-rose bengal-TBHP mediated, controlled oxidation of N-substituted 1,2,3,4-tetrahydroisoquinolines is developed for the synthesis of 3,4-dihydroisoquinolin-1(2H)-ones and isoquinolin-1(2H)-ones. The present method feature{\textquoteright}s a broad substrate scope, good functional group tolerances, and the products were prepared in good to excellent yields. The developed methodology further demonstrated in the synthesis of isoindolo[2,1-b] isoquinolin-5(7H)-one (topoisomerase-I inhibitor).

}, keywords = {2, 3, 4-Dihydroisoquinolin-1(2H)-one, 4-tetrahydroisoquinolines, Isoquinolin-1(2H)-one, N-substituted 1, Oxidation, Photocatalysis}, issn = {1615-4150}, doi = {10.1002/adsc.202001266, Early Access Date = JAN 2021}, author = {Bansode, Ajay H. and Suryavanshi, Gurunath} } @article {49412, title = {Hypervalent-iodine-mediated base-free oxidative olefination of benzylic amines to access α,β-unsaturated ketones}, journal = {Synlett}, year = {2024}, month = {AUG}, type = {Article; Early Access}, abstract = {

We report a one-pot base-free protocol for the oxidative olefination of benzylic amines promoted by a hypervalent iodine reagent for the synthesis of alpha,beta-unsaturated ketones. Mechanistically, (diacetoxyiodo)benzene oxidizes the benzylic amine to the corresponding imine, which, on reaction with a phenacyl(triphenyl)phosphonium bromide salt and an in situ generated acetoxy anion leads to an alpha,beta-unsaturated ketone. A wide range of alpha,beta-unsaturated ketones were easily accessed through direct oxidative olefination of substituted benzylic amines in good to excellent yields and with high E -selectivity.

}, keywords = {benzylic amines, enones, hypervalent iodine, olefination, Oxidation}, issn = {0936-5214}, doi = {10.1055/s-0043-1775392}, author = {Rupanawar, Bapurao D. and Bansode, Ajay H. and Suryavanshi, Gurunath} }