Organic-base-catalyzed synthesis of phthalides via highly regioselective intramolecular cyclization reaction

C Kanazawa, M Terada - Tetrahedron letters, 2007 - Elsevier
The organic-base-catalyzed 5-exo intramolecular cyclization reaction of o-alkynylbenzoic
acid produces the corresponding phthalide regioselectively in good to excellent yields. The …

One-pot synthesis of phthalides via regioselective intramolecular cyclization from ortho-alkynylbenzaldehydes

J Li, E Chin, AS Lui, L Chen - Tetrahedron Letters, 2010 - Elsevier
One-pot synthesis of phthalides via regioselective intramolecular cyclization from ortho-alkynylbenzaldehydes
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Ruthenium (II)-catalyzed synthesis of phthalides via the cascade addition and cyclization of aromatic acids with aldehydes

J Fan, PM Wang, JN Wang, X Zhao, ZW Liu… - Science China …, 2018 - Springer
The ruthenium-catalyzed intermolecular cascade cyclization of aromatic acids with aromatic
aldehydes, which involves the direct insertion of C–H bond into a polar C= O bond and the …

TfOH-Catalyzed Cascade Reaction: Metal-Free Access to 3,3-Disubstituted Phthalides from o-Alkynylbenzoic Acids

Y Zhang, Z Zhang, Y Xia, J Wang… - The Journal of Organic …, 2023 - ACS Publications
A facile new method for the synthesis of 3, 3-disubstituted phthalides is reported. A
successive reaction process begins with the TfOH-catalyzed cyclization of o-alkynylbenzoic …

Sequential one-pot approach for the synthesis of functionalized phthalans via Heck-reduction–cyclization (HRC) reactions

J Krishna, P Niharika, G Satyanarayana - RSC Advances, 2015 - pubs.rsc.org
An efficient and practical method is described for the direct synthesis of 1, 3-
dihydroisobenzofurans, an important structural motif present in biologically active natural or …

Organocatalyzed Synthesis of Highly Functionalized Phthalimides via Diels–Alder Reaction Employing Two Dienophiles

MS Akhtar, YR Lee - The Journal of Organic Chemistry, 2020 - ACS Publications
An efficient and facile protocol for the synthesis of biologically and pharmaceutically
important phthalimides is developed by l-proline-catalyzed reaction between two …

LPDE-catalyzed intramolecular cyclization of arylimines: a facile synthesis of tetrahydrochromanoquinolines

JS Yadav, BVS Reddy, CV Rao, R Srinivas - Synlett, 2002 - thieme-connect.com
Lithium perchlorate in diethyl ether (LPDE) is found to catalyze an intrarmolecular cyclization
of aldimines derived from aromatic amines and O-prenyl derivatives of salicylaldehydes to …

KO t-Bu/DMF promoted intramolecular cyclization of 1, 1′-biphenyl aldehydes and ketones: an efficient synthesis of phenanthrenes

Y Chen, N Zhang, L Ye, J Chen, X Sun, X Zhang… - RSC Advances, 2015 - pubs.rsc.org
KO t -Bu/DMF promoted intramolecular cyclization of 1,1′-biphenyl aldehydes and ketones:
an efficient synthesis of phenanthrenes - RSC Advances (RSC Publishing) DOI:10.1039/C5RA07188G …

Intramolecular ipso-Halocyclization of 4-(p-Unsubstituted-aryl)-1-alkynes Leading to Spiro[4,5]trienones: Scope, Application, and Mechanistic Investigations

BX Tang, YH Zhang, RJ Song, DJ Tang… - The Journal of …, 2012 - ACS Publications
A new, general method for the synthesis of spiro [4, 5] trienones is described by the
intramolecular ipso-halocyclization of 4-(p-unsubstituted-aryl)-1-alkynes. In the presence of …

Pd-catalyzed tandem cyclization of ethyl glyoxalate and amines: Rapid assembly of highly substituted cyclic Dehydro-α-Amino acid derivatives

Y Luo, X Lu, Y Ye, Y Guo, H Jiang, W Zeng - Organic letters, 2012 - ACS Publications
Pd-Catalyzed Tandem Cyclization of Ethyl Glyoxalate and Amines: Rapid Assembly of
Highly Substituted Cyclic Dehydro-α-Amino Acid Derivatives | Organic Letters ACS ACS …