Results 41 to 50 of about 2,106,514 (153)

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, Volume 29, Issue 32, 24 August 2026.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

A switchable dual organocatalytic system and the enantioselective total synthesis of the quadrane sesquiterpene suberosanone

, 2016
International audienceThe combination of aminocatalysis with N-heterocyclic carbene catalysis has been extended to a switchable dual catalytic system, which allowed a direct enantioselective entry to bridged bicyclo[3.n.1] ring systems and the total ...
Giorgi, Michel, Presset, Marc, Coquerel, Yoann, Naubron, Jean-Valère, Ren, Yajun, Godemert, Jérémy, Rodriguez, Jean, Vanthuyne, Nicolas   +7 more
core   +1 more source

Enantioselective synthesis of bicyclo[3.n.1]alkanes by chiral phosphoric acid-catalyzed desymmetrizing Michael cyclizations [PDF]

, 2015
2,2-Disubstituted cyclic 1,3-diketones containing a tethered electron-deficient alkene undergo chiral phosphoric acid-catalyzed desymmetrizing Michael cyclizations to give bridged bicyclic products in high enantioselectivities. Both bicyclo[3.2.1]octanes
Lam, Hon Wai, Roy, Iain D., Burns, Alan R., Madec, Amaël G. E., Low, Darryl W.   +4 more
core   +1 more source

Silver-Promoted Reactions of Bicyclo[3.2.1]octadiene Derivatives

, 2016
Highly substituted bicyclo[3.2.1]octadiene building blocks are easily prepared from tetrachloro- or tetrabromocyclopropene through reaction with cyclic dienes.
Merle A. Battiste (2509483), Ravi S. Orugunty (2726407), Khalil A. Abboud (1274355), Dennis L. Wright (184896)   +3 more
core   +1 more source

A simple approach to the construction of bicyclo[5.2.1] and [5.3.1] ring systems from bicyclo[2.2.1]Heptane precursors

, 1990
A simple two step sequence for the construction of highly functionalised bicyclo[5.2.1]decane and its transformation to bicyclo[5.3.1]undecane is described for entry into bridged ring ...
Bhattacharya, Atashi, Ghosh, Subrata, Saha, Goutam, Roy, Supti Saha, Atashi Bhattacharya, Subrata Ghosh, Supti Saha Roy, Goutam Saha   +7 more
core   +1 more source

Nitrogen-Bridged Heterocycles via Cycloaddition of Non-Classical Heterocyclicfused-[c]thiazoles

, 2011
The [4π+2π] cycloaddition of non-classical heterocyclic-fused-[c]thiazoles was explored allowing the synthesis of a range of new nitrogen-bridged bi-, tri- and tetracyclic heterocyclic compounds namely, pyrazolo[1,5-a]pyridines, thiazolo[2,3,4-cd ...
Teresa M.V.D. Pinho e Melo, Melo, Teresa M. V. D. Pinho e, Soares, Maria I. L., Clara S.B. Gomes, Gomes, Clara S. B., Maria I.L. Soares   +5 more
core   +1 more source

B(C6F5)3-Catalyzed Formal (n+3) (n = 5,6) Cycloaddition of Bicyclo[1.1.0]butanes to Medium Bicyclo[n.1.1]alkanes [PDF]

Herein, a B(C6F5)3-catalyzed formal (n+3) (n = 5,6) cycloaddition of bicyclo[1.1.0]butanes (BCBs) with imidazolidines/hexahydropyrimidines is described.
Ming, Lang, Shiyong, Peng, Haiyang, Wang, Liangliang, Yang, Jian, Wang   +4 more
core   +2 more sources

One-pot Diels–Alder cycloaddition/gold(I)-catalyzed 6-endo-dig cyclization for the synthesis of the complex bicyclo[3.3.1]alkenone framework

, 2011
The rapid synthesis of bicyclo[m.n.1]alkanone cores possessing quaternary carbon centers adjacent to a bridged ketone represents a significant synthetic challenge.
Louis Barriault, Gabriel Bellavance, Francis Barabé, Boubacar Sow   +3 more
core   +1 more source

Prins-pinacol synthesis of a variety of highly functionalized bicyclo[4n1]alkanones

, 2006
Bridged ring cores possessing quaternary carbon centers adjacent to a bridged ketone constitute challenging structures in synthesis. Therefore, this thesis explores the development of the first Prins-pinacol synthesis of cis-fused bicyclo[4,n,1]alkanones.
Lavigne, Roch M. A
core   +1 more source

Some sigmatropic rearrangements of polyfluoroaromatic and heteroaromatic compounds [PDF]

, 1986
This Thesis describes some [3,3] and [2,3] -sigmatropic rearrangements that can occur in a variety of polyfluoroaromatic and -heteroaromatic compounds. The presence of fluorine on the aromatic moiety precludes the normal rearomatization process. The
Ferguson, John Alasdair Kerr Jamie
core