00771nas a2200157 4500008004100000245005800041210005600099260000800155300001400163490000600177520026100183100003000444700002400474700002500498856009000523 2015 eng d00aReverse-hydroformylation: a missing reaction explored0 aReversehydroformylation a missing reaction explored cAUG a1422-14240 v23 a

Recent progress in transition-metal catalysed acceptor- and acceptorless-reverse hydroformylation of aldehydes for the conversion of olefins has been discussed. The aldehyde feedstock serves as a source for production of syngas and valuable alkenes.

1 aNandakumar, Avanashiappan1 aSahoo, Manoj, Kumar1 aBalaraman, Ekambaram uhttps://library.ncl.res.in/content/reverse-hydroformylation-missing-reaction-explored01418nas a2200181 4500008004100000022001400041245009500055210006900150260007500219300001600294490000700310520068400317100003001001700002401031700003001055700002501085856012601110 2015 eng d a1433-785100aTransition-metal-catalyzed hydrogen-transfer annulations: access to heterocyclic scaffolds0 aTransitionmetalcatalyzed hydrogentransfer annulations access to  aPOSTFACH 101161, 69451 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcSEP a11022-110340 v543 a

The ability of hydrogen-transfer transition-metal catalysts, which enable increasingly rapid access to important structural scaffolds from simple starting materials, has led to a plethora of research efforts on the construction of heterocyclic scaffolds. Transition-metal-catalyzed hydrogen-transfer annulations are environmentally benign and highly atom-economical as they release of water and hydrogen as by-product and utilize renewable feedstock alcohols as starting materials. Recent advances in this field with respect to the annulations of alcohols with various nucleophilic partners, thus leading to the formation of heterocyclic scaffolds, are highlighted herein.

1 aNandakumar, Avanashiappan1 aMidya, Siba, Prasad1 aLandge, Vinod, Gokulkrish1 aBalaraman, Ekambaram uhttps://library.ncl.res.in/content/transition-metal-catalyzed-hydrogen-transfer-annulations-access-heterocyclic-scaffolds02097nas a2200169 4500008004100000245010400041210006900145260000800214300001400222490000600236520146300242100002501705700003001730700002001760700002101780856012601801 2017 eng d00aIron-catalyzed dehydrogenation reactions and their applications in sustainable energy and catalysis0 aIroncatalyzed dehydrogenation reactions and their applications i cAUG a3177-31950 v73 aInspired by nature, chemists have designed new catalysts in the pursuit of selective bond activation and chemical transformations. Emergent biological systems often use earth-abundant first-row transition elements as catalytically active sites to facilitate specific and highly selective chemical processes. The design of a new catalytic system based on abundant and inexpensive catalysts, particularly the iron-based catalysts, for fundamentally significant synthetic transformations under environmentally benign conditions is an important paradigm in chemical synthesis. In recent times, iron-based catalytic systems have shown unprecedented reactivity in the acceptorless dehydrogenation reactions of feedstock chemicals, with the liberation of molecular hydrogen as the by-product, and have enabled greener chemical synthetic methods and alternative energy storage systems. Indeed, it has been demonstrated that the proper design of iron catalysts by judiciously choosing ligands, can aid in the development of new sustainable energy storage systems and catalysis. This tutorial review focuses on the recent development of iron-based dehydrogenation reactions of fundamentally important feedstock, as a route to sustainable chemical synthesis and energy storage applications. The emerging area of the iron-based dehydrogenation strategy provides an opportunity to make industrially applicable, cost-effective and environmentally benign catalytic systems.1 aBalaraman, Ekambaram1 aNandakumar, Avanashiappan1 aJaiswal, Garima1 aSahoo, Manoj, K. uhttps://library.ncl.res.in/content/iron-catalyzed-dehydrogenation-reactions-and-their-applications-sustainable-energy-and01486nas a2200193 4500008004100000245011800041210006900159260000800228300001400236490000700250520076300257100002001020700002001040700002701060700003001087700001901117700002501136856013101161 2018 eng d00a Ni-catalyzed alpha-alkylation of unactivated amides and esters with alcohols by hydrogen auto-transfer strategy 0 aNicatalyzed alphaalkylation of unactivated amides and esters wit cNOV a3911-39160 v113 aA transition-metal-catalyzed borrowing hydrogen/hydrogen auto-transfer strategy allows the utilization of feedstock alcohols as an alkylating partner, which avoids the formation of stoichiometric salt waste and enables a direct and benign approach for the construction of C-N and C-C bonds. In this study, a nickel-catalyzed alpha-alkylation of unactivated amides and ester (tert-butyl acetate) is carried out by using primary alcohols under mild conditions. This C-C bond-forming reaction is catalyzed by a new, molecularly defined nickel(II) NNN-pincer complex (0.1-1 mol %) and proceeds through hydrogen auto-transfer, thereby releasing water as the sole byproduct. In addition, N-alkylation of cyclic amides under Ni-catalytic conditions is demonstrated.1 aMidya, Siba, P.1 aRana, Jagannath1 aPitchaimani, Jayaraman1 aNandakumar, Avanashiappan1 aMadhu, Vedichi1 aBalaraman, Ekambaram uhttps://library.ncl.res.in/content/ni-catalyzed-alpha-alkylation-unactivated-amides-and-esters-alcohols-hydrogen-auto-transfer01243nas a2200181 4500008004100000022001400041245012700055210006900182260000800251300001400259490000700273520055300280100002200833700002000855700003000875700002500905856013100930 2018 eng d a1359-734500aPd(II)-Catalyzed gamma-C(sp(3))-H alkynylation of amides: selective functionalization of R chains of amides (RC)-C-1(O)NHR0 aPdIICatalyzed gammaCsp3H alkynylation of amides selective functi cJUL a7483-74860 v543 a

The gamma C(sp(3))-H bond alkynylation of R chains of amides (RC)-C-1(O)NHR, a fundamental class of synthetic substrates, has not been accomplished to date. Here, the first example of palladium(ii)-catalyzed alkynylation of an unactivated gamma C(sp(3))-H bond of alkyl amides (cyclic, linear, and amino acids) is reported. The kinetic experiment shows that the rate of the reaction depends on the coupling partners and the amides. Late-stage diversification of alkynylated amides was developed by utilizing amine and alkyne functionalities.

1 aLandge, Vinod, G.1 aParveen, Ayisha1 aNandakumar, Avanashiappan1 aBalaraman, Ekambaram uhttps://library.ncl.res.in/content/pdii-catalyzed-gamma-csp3-h-alkynylation-amides-selective-functionalization-r-chains-amides