@article {42847, title = {Facile strategy for accessing 3-alkynylchromones through gold-catalyzed alkynylation/cyclization of o-hydroxyarylenaminones}, journal = {Chemical Communications}, volume = {52}, year = {2016}, month = {SEP}, pages = {12306-12309}, abstract = {

A strategy based on tandem alkynylation of o-hydroxyarylenaminones followed by intramolecular cyclization has been developed to generate a diverse array of 3-alkynyl chromones. The functionality embedded in these key intermediates enables their facile elaboration into more diverse structures by a variety of functionalizations and ring-forming processes.

}, doi = {10.1039/C6CC07119H}, author = {Akram, Manjur O. and Bera, Saibal and Patil, Nitin T.} } @article {42825, title = {[3+2]-Annulation of platinum-bound azomethine ylides with distal C[double bond, length as m-dash]C bonds of N-allenamides}, journal = {Chemical Communications}, volume = {53}, year = {2017}, month = {JAN}, pages = {196-199}, type = {Article}, abstract = {

A Pt-catalyzed, highly regioselective reaction between N-allenamides and imino-alkynes leading to pyrrolo[1,2-a] indoles is described. This represents the first example of [3+2]-annulation of Pt-bound azomethine ylides with the distal CQC bond of N-allenamides. The mechanism of the reaction was established by computational studies.

}, doi = {10.1039/c6cc07874e}, author = {Chakrabarty, Indradweep and Inamdar, Suleman M. and Akram, Manjur O. and Gade, Amol B. and Banerjee, Subhrashis and Bera, Saibal and Patil, Nitin T.} } @article {43877, title = {Cross-coupling reactions of aryldiazonium salts with allylsilanes under merged gold/visible-light photoredox catalysis}, journal = {Organic Letters}, volume = {19}, year = {2017}, month = {JUN}, pages = {3075-3078}, type = {Article}, abstract = {A method for the cross-coupling reactions of aryldiazonium salts with trialkylallylsilanes via merged gold/photoredox catalysis is described. The reaction is proposed to proceed through a photoredox-promoted generation of an electrophilic arylgold(III) intermediate that undergoes transmetalation with allyltrimethylsilane to form allylarenes.}, doi = {10.1021/acs.orglett.7b01148}, author = {Akram, Manjur O. and Mali, Pramod S. and Patil, Nitin T.} } @article {44487, title = {Gold(I)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes}, journal = {Organic \& Biomolecular Chemistry}, volume = {16}, year = {2018}, month = {APR}, pages = {2865-2869}, type = {Article}, abstract = {

Gold(I)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes are described. This redox neutral strategy offers an efficient approach to diverse biaryls, vinyl arenes and arylacetylenes. Monitoring the reaction with NMR and ESI-MS provided strong evidence for the in situ formation of Ph3PAuIR (R = aryl, vinyl and alkynyl) species which is crucial for the activation of aryldiazonium salts.

}, doi = {10.1039/C8OB00630J}, author = {Akram, Manjur O. and Shinde, Popat S. and Chintawar, Chetan C. and Patil, Nitin T.} } @article {45424, title = { Oxidant-free oxidative gold catalysis: the new paradigm in cross-coupling reactions}, journal = {Chemical Communications}, volume = {54}, year = {2018}, month = {OCT}, pages = {11069-11083}, type = {Article}, abstract = {

The construction of C-C and C-X (X = hetero atom) bonds is the core aspect for the assembly of molecules. In this regard, late transition-metal-catalyzed cross-coupling reactions have retained their dominance for decades. Lately, gold catalysts have been emerging as a reliable contender for such transformations owing to the recent findings that reveal gold{\textquoteright}s potential beyond carbophilic -Lewis acid. The newfound ability of gold to undergo redox transformations under certain circumstances has allowed us to explore gold catalysts as a viable alternative to other late transition-metals for efficient construction of cross-coupled products. This feature article critically presents an overview of all the redox neutral cross-coupling reactions enabled by gold catalysis, which we believe would stimulate further research activities in this promising area.

}, isbn = {1359-7345}, doi = {10.1039/c8cc05601c}, author = {Akram, Manjur O. and Banerjee, Somsuvra and Saswade, Sagar S. and Bedi, Vaibhav and Patil, Nitin T.} } @article {44623, title = {Visible light mediated desilylative C(sp(2))-C(sp(2)) cross-coupling reactions of arylsilanes with aryldiazonium salts under Au(i)/Au(iii) catalysis}, journal = {Chemical Communications}, volume = {54}, year = {2018}, month = {JUL}, pages = {7223-7226}, abstract = {

Desilylative C(sp(2))-C(sp(2)) cross-coupling reactions of arylsilanes with aryldiazonium salts under Au(i)/photoredox catalysis have been reported. The addition of Cu-salts as catalysts was found to be crucial for the success of this transformation.

}, issn = {1359-7345}, doi = {10.1039/c8cc03925a}, author = {Chakrabarty, Indradweep and Akram, Manjur O. and Biswas, Suprakash and Patil, Nitin T.} } @article {46338, title = {Ligand-enabled gold-catalyzed C(sp(2))-n cross-coupling reactions of aryl iodides with amines}, journal = {Organic Letters}, volume = {21}, year = {2019}, month = {OCT }, pages = {8101-8105}, type = {Article}, abstract = {

The first example of ancillary (P,N)-ligand-enabled gold-catalyzed C-N cross-coupling reactions of aryl iodides with amines is reported. The high generality of the reaction in de novo synthesis, late-stage modifications, and cascade processes to access functionalized indolinones and carbazoles underscores the synthetic potential of the presented strategy. Monitoring the reaction with ESI-HRMS and NMR provided strong evidence for the in situ formation of putative high valent Au(III) intermediates.

}, issn = {1523-7060}, doi = {10.1021/acs.orglett.9b03082}, author = {Akram, Manjur O. and Das, Avishek and Chakrabarty, Indradweep and Patil, Nitin T.} } @article {46317, title = {Ortho-oxygenative 1,2-difunctionalization of diarylalkynes under merged gold/organophotoredox relay catalysis}, journal = {Chemistry-An Asian Journal}, year = {2019}, month = {OCT}, type = {Article; Early Access}, abstract = {

Reported herein is an ortho-oxygenative 1,2-difunctionalization of diarylalkynes under merged gold/organophotoredox catalysis to access highly functionalized 2-(2-hydroxyaryl)-2-alkoxy-1-arylethan-1-ones. Detailed mechanistic studies suggested a relay process, initiating with gold-catalyzed hydroalkoxylation of alkynes, to generate enol-ether followed by a key formal [4+2]-cycloaddition reaction. The successful application of the present methodology was also shown for the synthesis of benzofurans.

}, keywords = {binary catalyst system, Gold catalysis, organocatalyst, photoredox, synthetic methodology}, issn = {1861-4728}, doi = {10.1002/asia.201901275}, author = {Sancheti, Shashank P. and Akram, Manjur O. and Roy, Rupam and Bedi, Vaibhav and Kundu, Shubhankar and Patil, Nitin T.} }