Results 211 to 220 of about 25,436 (256)

Synthesis of Small 3-Fluoro- and 3,3-Difluoropyrrolidines Using Azomethine Ylide Chemistry.

Journal of Organic Chemistry, 2015
Here, we report accessing small 3-fluoropyrrolidines and 3,3-difluoropyrrolidines through a 1,3-dipolar cycloaddition with a simple azomethine ylide and a variety of vinyl fluorides and vinyl difluorides.
Indrawan J. McAlpine, M. Tran-Dube, Fen Wang, S. Scales, Jean J Matthews, M. Collins, S. Nair, Mary M. Nguyen, J. Bian, Luis Martinez Alsina, Jianmin Sun, Jiaying Zhong, J. Warmus, B. O’Neill   +13 more
semanticscholar   +1 more source

Azomethine, Carbonyl and Thiocarbonyl Ylides — Generation of Azomethine Ylides by Condensation of Aldehydes with N‐Substituted α‐Amino Esters [PDF]

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
M. Nyerges, L. Toke
openaire   +1 more source

Synthesis of Main-Chain Poly(fullerene)s from a Sterically Controlled Azomethine Ylide Cycloaddition Polymerization

, 2016
Fullerene is used as a monomer in this simple method to prepare soluble, well-defined polymers. The sterically controlled azomethine ylide cycloaddition polymerization of fullerene (SACAP) yields macromolecules with molecular weights of around 25 000 g ...
Hasina H Ramanitra, H. S. Silva, B. Bregadiolli, A. Khoukh, Craig Combe, Simon A Dowland, D. Bégué, Carlos Frederico de Oliveira Graeff, Christine Dagron-Lartigau, A. Distler, Graham Morse, R. Hiorns   +11 more
semanticscholar   +1 more source

Detection of an azomethine ylide and its conversion to aziridine

The Journal of Organic Chemistry, 1987
AbstractThe imine (I) is coupled with the trifluoromethanesulfonate (II) to produce the salt (III).
C. K. Mcclure, G. R. Martinez, Edwin Vedejs, S. Dax   +3 more
openaire   +3 more sources

Synthesis of Bis-pyrrolizidine-Fused Dispiro-oxindole Analogues of Curcumin via One-Pot Azomethine Ylide Cycloaddition: Experimental and Computational Approach toward Regio- and Diastereoselection.

Organic Letters, 2015
Curcumin has been transformed to racemic curcuminoids via an azomethine ylide cycloaddition reaction using isatin/acenaphthoquinone and proline as the reagents.
Yogesh P. Bharitkar, Mohua Das, N. Kumari, M. Padma Kumari, A. Hazra, Sagar S. Bhayye, R. Natarajan, Siddharth Shah, S. Chatterjee, N. B. Mondal   +9 more
semanticscholar   +1 more source

Recent Advances in Azomethine Ylide Chemistry

1989
Publisher Summary Azomethine ylides are planar molecules composed of one nitrogen and two terminal sp2 carbons. At most, four geometrical isomers are possible for these transient molecules. Their cycloadditions to olefin or acetylene dipolarophiles give rise to the formation of two sets of carbon-carbon bonds in a single step.
Otohiko Tsuge, Shuji Kanemasa
openaire   +2 more sources

ChemInform Abstract: 1,7‐Electrocyclization of Non‐Stabilized Azomethine Ylides.

ChemInform, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Miklos Nyerges, Andrea Arany, Paul W. Groundwater   +2 more
openaire   +3 more sources

Regio- and Stereoselective Synthesis of Spiropyrrolizidines and Piperazines through Azomethine Ylide Cycloaddition Reaction.

Journal of Organic Chemistry, 2015
A series of original spiropyrrolizidine derivatives has been prepared by a one-pot three-component [3 + 2] cycloaddition reaction of (E)-3-arylidene-1-phenyl-pyrrolidine-2,5-diones, l-proline, and the cyclic ketones 1H-indole-2,3-dione (isatin ...
S. Haddad, Sarra Boudriga, F. Porzio, A. Soldera, Moheddine Askri, M. Knorr, Yoann Rousselin, M. Kubicki, C. Golz, C. Strohmann   +9 more
semanticscholar   +1 more source

Cycloaddition reactions of pyridinium and related azomethine ylides

The Journal of Organic Chemistry, 1993
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Laura Precedo, Albert Padwa, David J. Austin, Lin Zhi   +3 more
openaire   +3 more sources

1,3-Dipolar Cycloaddition Reactions of Porphyrins with Azomethine Ylides [PDF]

The Journal of Organic Chemistry, 2005
[reaction: see text] The behavior of porphyrins as dipolarophiles in 1,3-dipolar cycloadditions with azomethine ylides was studied. Depending on the nature of the substituent groups on the porphyrin macrocycles, the reaction can give monoadducts (chlorins) or bisadducts (isobacteriochlorins and bacteriochlorins). When a large excess of azomethine ylide
Maria G. P. M. S. Neves, Ana M. G. Silva, and Artur M. S. Silva, Augusto C. Tomé, José A. S. Cavaleiro   +4 more
openaire   +2 more sources