Results 101 to 110 of about 17,341 (257)

A Concise and Stereoselective Total Synthesis of Paecilomycin E

Natural Product Communications, 2019
A concise approach for the first total synthesis of paecilomycin E is described involving Alder-Rickert reaction, Mitsunobu esterification and ring closing metathesis as the key steps.
A. Srinivas Reddy, Gundamalla Bhavani, Sandhya Jonnala, Rajashaker Bantu, B. V. Subba Reddy   +4 more
doaj   +1 more source

Catalyst-Controlled Stereoselective Olefin Metathesis as a Principal Strategy in Multistep Synthesis Design: A Concise Route to (+)-Neopeltolide [PDF]

, 2014
Molybdenum-, tungsten-, and ruthenium-based complexes that control the stereochemical outcome of olefin metathesis reactions have been recently introduced. However, the complementary nature of these systems through their combined use in multistep complex
Chakraborty, Crimmins, Crimmins, Custar, Doucet, Evans, Feldman, Fettes, Feutrill, Fuwa, Fuwa, Fürstner, Garber, Gillingham, Gradillas, Guinchard, Hartung, Hartung, Herbert, Hirsch-Weil, Hornberger, Houri, Hoveyda, Hoveyda, Hoveyda, Hoveyda, Ibrahem, Jones, Khan, Khan, Kiesewetter, Koh, Malcolmson, Mann, Meek, Meng, Murdzek, Nagao, Nicolaou, Oppolzer, Paterson, Paterson, Peixoto, Prunet, Quigley, Radomkit, Ralston, Rosebrugh, Schnürch, Scholl, Schrock, Su, Townsend, Van Orden, Wang, Wang, Wang, Willwacher, Wipf, Woo, Wu, Yang, Youngsaye, Yu, Yu   +64 more
core   +1 more source

Morphological Control of Aurophilic Chains of Gold(I) Dithiolate Dimers With Alkali and Alkali Earth Cations

Chemistry – A European Journal, EarlyView.
Luminescent coordination polymers of Group 1 (Li, K, Cs) and 2 (Mg─Ba) cations with gold(I) iso‐maleonitriledithiolate ({Au2[S2C = C(CN)2]}2−) units were prepared; 1‐D aurophilic chains are present in all cases. The structures strongly depend on cation charge and size, with N‐cyano coordination observed in the Gp 1 and larger Gp 2 cations. Increasingly
Jefferson A. Pells, William W. L. Ho, Daniel B. Leznoff   +2 more
wiley   +1 more source

First Stereoselective Total Synthesis of (3)-De--methylbotryosphaeriodiplodin

Natural Product Communications, 2019
A simple and highly efficient first stereoselective total synthesis of a benzofused macrocyclic lactone, ( 3S,7R )-de- O -methylbotryosphaeriodiplodin has been accomplished utilizing Jacobson's kinetic resolution, Marouka asymmetric allylation, Stille ...
Jhillu S. Yadav, Chitteti Divya Vani, Mule Chowdeswari, K. Ananthalakshmi, N. Bhasker, Basi V. Subba Reddy   +5 more
doaj   +1 more source

Stereoselective synthesis of hydroxylated 3-aminoazepanes using a multi-bond forming, three-step tandem process [PDF]

, 2012
A multi-bond forming, three-step tandem process involving a palladium(II)-catalysed Overman rearrangement and a ring closing metathesis reaction has been utilised for the efficient synthesis of a 2,3,6,7-tetrahydro-3-amidoazepine.
Ahmad, Ahmad, Anderson, Anderson, Anderson, Andrew Sutherland, Bernstein, Blades, Blanchette, Cant, Cardillo, Chapman, Cini, Cook, Cutri, Cutri, Delmore, Donohoe, Donohoe, Donohoe, Elhalem, Fürstner, Gilmet, Henbest, Horbal, Ireland, Jobson, Jobson, Kantorowski, Kazi, Kulanthaivel, Kurihara, Lampe, Louvel, Maier, Masse, McGonagle, Miyabe, Miyabe, Moriwake, Nicolaou, Nomura, O'Brien, Overman, Pimlott, Riber, Sajjad Ahmad, Sanford, Scholl, Schwab, Schwab, Srivastava, Stevens, Swift, Swift, Tietze, Trost, Valle, Watson, Würdemann, Yar, Yaragorla, Yet, Zaed   +63 more
core   +1 more source

Synthesis and Reactivity of Extremely Electron‐Poor Au(III) Complexes Bearing OTf− or NTf2− Ligands

Chemistry – A European Journal, EarlyView.
A new family of electron‐poor Au(III) cations bearing bistriflimide or triflate ligands is reported. These cations can undergo direct C─H metalation with simple arenes to give mono‐aryl cations. Subsequent addition of simple halide sources allows for reductive elimination of aryl halides, formally from Ar─H and X−. ABSTRACT The synthesis and structural
Lachlan Barwise, Emily Mulhallen‐Graham, Lachlan J. Moon, Lachlan Sharp‐Bucknall, Miracle I. Ekavhiare, Keith F. White, Jason L. Dutton   +6 more
wiley   +1 more source

The Synthesis of cis- and trans-Fused Bicyclic Sugar Amino Acids [PDF]

, 2006
Four isomeric bicyclic sugar amino acids (SAAs) were prepared from an α-acetylenic-C-glucoside by employing a Petasis olefination and a ring-closing metathesis (RCM) as key steps.
Anelli, Billing, Bornaghi, Chakraborty, Chakraborty, Chakraborty, Chatterjee, Cipolla, Coste, Dondoni, Durrat, Edwards, Fleet, Gregar, Grotenbreg, Halcomb, La Ferla, Leeuwenburgh, Leeuwenburgh, Locardi, Locardi, Mayes, Menand, Miller, Montero, Moss, Murray, Peri, Petasis, Raunkjaer, Schwab, Schweizer, Stöckle, Tanaka, Timmer, Trnka, Truffault, van Well   +37 more
core   +2 more sources

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Organic-Inorganic Hybrid Silica Material Derived from a Monosilylated Grubbs-Hoveyda Ruthenium Carbene as a Recyclable Metathesis Catalyst

Molecules, 2010
The synthesis of a monosilylated Grubbs-Hoveyda ruthenium alkylidene complex is described, as well as the preparation and characterization of the corresponding material by sol-gel cogelification with tetraethoxysilane (TEOS) and the assay of this ...
Michel Wong Chi Man, Ramón Alibés, Xavier Cattoën, Guadalupe Borja, Roser Pleixats   +4 more
doaj   +1 more source

Mapping the potential energy surfaces for ring-closing metathesis reactions of prototypical dienes by electronic structure calculations [PDF]

, 2011
The potential energy surfaces for ring-closing metathesis reactions of a series of simple alpha,omega-dienes which lead to 5-10 membered ring products, have been explored using density functional theory methods.
Hillier, I.H., Pandian, S., Percy, Jonathan, Vincent, M.A.   +3 more
core   +1 more source