Results 91 to 100 of about 938,190 (242)

Hybrid macrocycle formation and spiro annulation on cis-syn-cis-tricyclo[6.3.0.02,6]undeca-3,11-dione and its congeners via ring-closing metathesis

Beilstein Journal of Organic Chemistry, 2015
We have developed a simple methodology to transform cis-syn-cis-triquinane derivative 2 into the diindole based macrocycle 6 involving Fischer indolization and ring-closing metathesis (RCM).
Sambasivarao Kotha, Ajay Kumar Chinnam, Rashid Ali   +2 more
doaj   +1 more source

Phosphanyl Radicals From Bismuth‐Mediated Reactions and Sterically Encumbered Diphosphanes

Chemistry – A European Journal, EarlyView.
Reactions of LiPR2 with BiCl3 selectively give diphosphanes R2P–PR2 in high yields, presumably via Bi─P homolysis. This includes challenging cases with bulky substituents R. Sterically encumbered diphosphanes release persistent phosphanyl radicals [PR2]• in thermally initiated equilibrium reactions.
Sascha Reith, Marius Junghanns, Felix Möller, Crispin Lichtenberg   +3 more
wiley   +1 more source

Tandem Glycolate Claisen Rearrangement/Ring-Closing Metathesis:  A Stereochemically General Synthesis of Substituted Dihydropyran-2-carboxylates

, 2016
Tandem Glycolate Claisen Rearrangement/Ring-Closing Metathesis:  A Stereochemically General Synthesis of Substituted Dihydropyran-2 ...
James A. Morrison (3043614), Steven D. Burke (1695727), Michael J. Alberti (2667931), Raymond A. Ng (3043611)   +3 more
core   +2 more sources

Nitro-Grela-type complexes containing iodides – robust and selective catalysts for olefin metathesis under challenging conditions

Beilstein Journal of Organic Chemistry, 2015
Iodide-containing nitro-Grela-type catalysts have been synthesized and applied to ring closing metathesis (RCM) and cross metathesis (CM) reactions. These new catalysts have exhibited improved efficiency in the transformation of sterically, non-demanding
Andrzej Tracz, Mateusz Matczak, Katarzyna Urbaniak, Krzysztof Skowerski   +3 more
doaj   +1 more source

Synthesis of spirocyclic thiazolidinediones using ring-closing metathesis and one-pot sequential ring-closing/cross metathesis

, 2011
A novel synthetic route to spirocyclic thiazolidinediones is reported by utilizing ring-closing metathesis (RCM). A selective cross metathesis (CM) of N-allyl azaspiro derivatives with different olefins has been demonstrated to prepare substituted ...
Paladhi, Sushovan, Dash, Jyotirmayee, Sushovan Paladhi, Dhara, Kalyan, Midya, Ganesh Chandra, Jyotirmayee Dash, Kalyan Dhara, Ganesh Chandra Midya   +7 more
core   +1 more source

Hydrogen Release From Silicon─Hydrogen Systems: From Surface Chemistry to Higher‐Coordinate Molecular Mechanisms

Chemistry – A European Journal, EarlyView.
Hydrogen‐release processes in silicon chemistry occur across a broad spectrum of systems, including crystalline silicon surfaces, nanoporous materials, Zintl phases, and molecular hydrides. This Review highlights how Si─H activation and H2 evolution are governed by structure, coordination environment, and dynamic access to reactive geometries, with ...
Robin Rothfelder, Jonathan O. Bauer
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

Exploring the Reversibility of the Ring-Closing Metathesis Mediated Cross-linking of Dendrimers

, 2016
Exploring the Reversibility of the Ring-Closing Metathesis Mediated Cross-linking of ...
N. Gabriel Lemcoff (1677277), Steven C. Zimmerman (1272135), Stephanie L. Elmer (2470804)   +2 more
core   +1 more source

Persilylated and Related Silyl Anion‐Induced Synthesis of Group 3–10 Metal–Silyl Complexes

Chemistry – A European Journal, EarlyView.
Persilylated and related silyl anions serve as powerful tools for constructing metal–silyl complexes across group 3–10 elements. Their strong σ‐donating ability and steric bulk stabilize low‐coordinate, reactive species and enable unique bonding motifs.
Yusuke Sunada
wiley   +1 more source

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