Results 101 to 110 of about 337 (160)

Hybrid macrocycle formation and spiro annulation on cis-syn-cis-tricyclo[6.3.0.0(2,6)]undeca-3,11-dione and its congeners via ring-closing metathesis. [PDF]

Beilstein J Org Chem, 2015
Kotha S, Chinnam AK, Ali R.
europepmc   +1 more source

Design, Synthesis, Antifungal Evaluation, Structure-Activity Relationship (SAR) Study, and Molecular Docking of Novel Spirotryprostatin A Derivatives. [PDF]

Molecules
Ma YM, Miao X, Jia B, Sun ZY, Ma SY, Yan C.   +5 more
europepmc   +1 more source

Metallaelectro-catalyzed alkyne annulations via C-H activations for sustainable heterocycle syntheses.

Chem Commun (Camb)
Kushwaha P, Saxena A, von Münchow T, Dana S, Saha B, Ackermann L.   +5 more
europepmc   +1 more source

Oxidative spiroannulation of phenolic substrates

, 1985
openaire   +1 more source

Rh(III)-Catalyzed C8-Spiroannulation of 1-Aminonaphthalenes with Maleimides

The Journal of Organic Chemistry, 2023
The rhodium(III)-catalyzed C8-spiroannulation of 1-aminonaphthalenes with maleimides is described herein. Initially formed C8-alkenylated 1-aminonaphthalenes can intercept nucleophilic 1-amino groups through the intramolecular aza-Michael reaction, resulting in the formation of spirofused tetracyclic frameworks. This protocol displayed a wide substrate
Eunjae Chung, Suho Kim, Amitava Rakshit, Pargat Singh, Jaewook Park, Taejoo Jeong, In Su Kim   +6 more
core   +4 more sources

Dearomatization/Spiroannulation of Halophenols Enables the Forging of Contiguous Quaternary Carbon Cyclohexadienones

Organic Letters, 2023
A dearomatization/spiroannulation process has been successfully achieved between simple halophenols and α,β-unsaturated olefins under mild reaction conditions. This transformation addresses the chemoselectivity issue in the dearomatizative transformation of phenol scaffolds (6π-electron) caused by the SEAr process, enabling the construction of ...
Sichan Dong, Changzhen Fu, Yicong Ge, Jingjing Liu, Han Wang, Xinjun Luan   +5 more
openaire   +3 more sources

Some of the next articles are maybe not open access.

Related searches:

Studies towards the diastereoselective spiroannulation of phenolic derivatives

Tetrahedron Letters, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Guy L Plourde
exaly   +2 more sources

Cyclic Ketones in Spiroannulation

Synthetic Communications, 2009
Abstract Conversion of a cyclic carbonyl carbon into a quaternary carbon has been effected by a Wittig–Horner reaction with diethyl (N-benzyliden)aminomethylphosphonate and a subsequent alkylation with a protected vinyl ketone. The product was a substrate for spiroannulation after initial hydrolysis.
Vidar Bj⊘rnstad, Kjell Undheim
exaly   +2 more sources

Prins-pinacol spiroannulations

Tetrahedron, 1997
Abstract Lewis acid-promoted cyclizations of methylenecyclohexane siloxy acetals 14, 15 , and 21 afford spiro[4.5]decanones 22, 25 , and 29 in good yield. In all cases, exclusive pinacol rearrangement of C-1 of the original three-carbon acetal side chain is observed suggesting that pinacol rearrangement of the intermediate 9-decalyl cation ...
Keith P. Minor, Larry E. Overman
  +4 more sources

Rhodium-Catalyzed Enantioselective Spiroannulation of 2-Alkenylphenols with Alkynes

Chinese Journal of Organic Chemistry, 2023
Qing Gu
exaly   +2 more sources