<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Khopade, V. Kishor</style></author><author><style face="normal" font="default" size="100%">Sen, Anirban</style></author><author><style face="normal" font="default" size="100%">Birajdar, Rajkumar S.</style></author><author><style face="normal" font="default" size="100%">Paulbudhe, Uday P.</style></author><author><style face="normal" font="default" size="100%">Kavale, Dattatry S.</style></author><author><style face="normal" font="default" size="100%">Shinde, Prashant S.</style></author><author><style face="normal" font="default" size="100%">Mhaske, Santosh B.</style></author><author><style face="normal" font="default" size="100%">Chikkali, Samir H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Highly enantioselective synthesis of sitagliptin</style></title><secondary-title><style face="normal" font="default" size="100%">Asian Journal of Organic Chemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">asymmetric hydrogenation</style></keyword><keyword><style  face="normal" font="default" size="100%">catalysis</style></keyword><keyword><style  face="normal" font="default" size="100%">FerroLANE ligands</style></keyword><keyword><style  face="normal" font="default" size="100%">Rhodium</style></keyword><keyword><style  face="normal" font="default" size="100%">sitagliptin</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">FEB</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">189-191</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A highly enantioselective synthesis of sitagliptin, a potent DPP-4 inhibitor, is reported. Explicitly identified chiral FerroLANE ligands in the presence of rhodium catalyze the asymmetric hydrogenation of an enamine to yield sitagliptin with excellent enantioselectivity (98% ee). The process was scaled up to 5 g and the final product was isolated as a phosphate salt with &amp;gt;99% ee.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;
</style></custom3><custom4><style face="normal" font="default" size="100%">&lt;p&gt;3.130&lt;/p&gt;
</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Sen, Anirban</style></author><author><style face="normal" font="default" size="100%">Kumar, Rohit</style></author><author><style face="normal" font="default" size="100%">Pandey, Swechchha</style></author><author><style face="normal" font="default" size="100%">Raj, K. Vipin</style></author><author><style face="normal" font="default" size="100%">Kumar, Pawan</style></author><author><style face="normal" font="default" size="100%">Vanka, Kumar</style></author><author><style face="normal" font="default" size="100%">Chikkali, Samir H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Mechanistically guided one pot synthesis of phosphine-phosphite and its implication in asymmetric hydrogenation</style></title><secondary-title><style face="normal" font="default" size="100%">European Journal of Organic Chemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">asymmetric hydrogenation</style></keyword><keyword><style  face="normal" font="default" size="100%">catalysis</style></keyword><keyword><style  face="normal" font="default" size="100%">DOPA synthesis</style></keyword><keyword><style  face="normal" font="default" size="100%">One pot synthesis</style></keyword><keyword><style  face="normal" font="default" size="100%">Phosphine-phosphite ligand</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">JAN</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">2022</style></volume><pages><style face="normal" font="default" size="100%">e202101447</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;
	Although hybrid bidentate ligands are known to yield highly enantioselective products in asymmetric hydrogenation (AH), synthesis of these ligands is an arduous process. Herein, a one pot, atom-economic synthesis of a hybrid phosphine-phosphite (L1) is reported. After understanding the reactivity difference between an 0-nucleophile versus C-nucleophile, one pot synthesis of Senphos (L1) was achieved (72%). When L1 was treated with [Rh], P-31 NMR revealed bidentate coordination to Rh. Senphos, in the presence of rhodium, catalyzes the AH of Methyl-2-acetamido-3-phenylacrylate and discloses an unprecedented turn over frequency of 2289, along with excellent enantio-selectivity (92%). The generality is demonstrated by hydrogenating an array of alkenes. The AH operates under mild conditions of 1-2 bar H-2 pressure, at room temperature. The practical relevance of Ll is demonstrated by scaling-up the reaction to 1 g and by synthesizing DOPA, a drug widely employed for the treatment of Parkinson's disease. Computational insights indicate that the R isomer is preferred by 3.8 kcal/mol over the S isomer.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">&lt;p&gt;
	Foreign&lt;/p&gt;
</style></custom3><custom4><style face="normal" font="default" size="100%">&lt;p&gt;
	3.021&lt;/p&gt;
</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kumar, Rohit</style></author><author><style face="normal" font="default" size="100%">Sen, Anirban</style></author><author><style face="normal" font="default" size="100%">Chikkali, Samir H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Rh-catalyzed asymmetric hydroformylation of olefins using phosphorus ligands</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of chemical sciences </style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">catalysis</style></keyword><keyword><style  face="normal" font="default" size="100%">coordination</style></keyword><keyword><style  face="normal" font="default" size="100%">Hydroformylation</style></keyword><keyword><style  face="normal" font="default" size="100%">Phosphine-phosphite ligand</style></keyword><keyword><style  face="normal" font="default" size="100%">Phosphite ligand</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">NOV </style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">135</style></volume><pages><style face="normal" font="default" size="100%">108</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Easily accessible BINOL-based monodentate phosphite ligand L1 and hybrid ligand L2 have been synthesized in good yield by following a one-pot, two-step protocol. A single 31P resonance at 146.6 ppm confirmed the formation of L1. Subsequent 1-2D NMR and mass spectrometric analysis authenticated the existence of L1. These ligands afforded excellent activity and regio-selectivity in the Rh-catalyzed AHF of styrenic substrates. L1 showed excellent regioselectivity but did not discriminate between the two enantiomers, while L2 displayed an enantiomeric excess (ee) of up to 20%. In our attempts to understand the reasons for low ee, the coordination behavior of L2 was investigated. The coordination study revealed that L2 coordinates with the Rh as a monodentate ligand, although there are two P-sites. It was found that only the phosphine arm was coordinated to the Rh and the phosphite arm stayed away from the Rh core at the ambient temperature, leading to moderate ee.Graphical abstractOne-step synthesis of a phosphite (L1) and a phosphine-phosphite (L2) ligand and their implication in the asymmetric hydroformylation of olefins with excellent regioselectivity (&amp;gt;95%) and moderate enantioselectivity (up to 20%) is reported.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span class=&quot;cdx-two-column-grid-journal-container cdx-grid-gap&quot; style=&quot;display: grid;&quot;&gt;Indian&lt;/span&gt;&lt;/p&gt;
</style></custom3><custom4><style face="normal" font="default" size="100%">&lt;p&gt;1.7&lt;/p&gt;
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