Results 201 to 210 of about 17,890 (211)
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Solid-Liquid Phase Transfer Catalytic Synthesis(VI) 1:3-Dipolar Cycloaddition Reactions of Aldimines

Synthetic Communications, 1987
Abstract 1:3-Dipolar cycloaddition reactions of aldimines with dipolarophiles can be performed under solid-liquid phase transfer catalytic conditions or in protic alkanol solvents using solid K2CO3 as a base. The reactions are synthetically useful in preparing NH-pyrrolidines.
Jiang Yaozhong   +2 more
openaire   +1 more source

ChemInform Abstract: Synthesis of Novel Pyrazoles via [2 + 3]‐Dipolar Cycloaddition Using Alkyne Surrogates.

ChemInform, 2010
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.
Sureshbabu Dadiboyena   +2 more
openaire   +1 more source

ChemInform Abstract: Synthesis of Carborane‐Containing Nitroimidazole Compounds via Mild 1, 3‐Dipolar Cycloaddition.

ChemInform, 1992
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.
M. SCOBIE, M. D. THREADGILL
openaire   +1 more source

One-Pot Sequential [3 + 3] Dipolar Cycloaddition of Aldehyde or Ketone and Hydroxylamine with Spirocyclopropyl Oxindole

The Journal of Organic Chemistry, 2018
A Sc(OTf)3-catalyzed highly diastereoselective one-pot sequential [3 + 3] dipolar cycloaddition reaction of aldehyde or ketone, N-alkyl hydroxylamine, and spirocyclopropyl oxindole is developed, allowing facile construction of spirocyclic oxindole-tetrahydro-1,2-oxazines with sufficient structural diversity. The corresponding catalytic enantioselective
Peng-Wei Xu   +6 more
openaire   +2 more sources

ChemInform Abstract: Synthesis of Spiro Sugar Isoxazolidines via Tandem Michael Addition 1, 3‐Dipolar Cycloaddition.

ChemInform, 1991
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.
M. YOKOYAMA, N. YAMADA, H. TOGO
openaire   +1 more source

Novel 1, 3-Dipolar Cycloadditions of Cyclobutene Diester Epoxides to Polycyclic Aromatic Hydrocarbons

2003
This paper announces the results of certain 1, 3-dipolar cycloadditions to polycyclic aromatic hydrocarbons (PAHs). The 1, 3-dipoles generated from cyclobutene diester epoxides thermally reacted with PAHs to give cycloadducts. This reaction demonstrated the remarkable ability of these 1, 3-dipoles to disrupt an aromatic system by adding across specific
Margetić, Davor   +2 more
openaire   +3 more sources

2 + 3 Dipolar cycloadditions of a monomeric thioaldehyde

The Journal of Organic Chemistry, 1986
E. Vedejs, R. G. Wilde
openaire   +1 more source

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