Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Jaydip Ghosh"'
Publikováno v:
Tetrahedron Letters. 57:3354-3357
An efficient transformation of 3-(1-alkynyl)chromone 1 to 2-(2-hydroxyphenyl)-5-phenylfuran-3-carbaldehyde 2 has been accomplished using AgNO 3 as catalyst. The ring-chain tautomerism of 2 depends on solvent and substituent.
Publikováno v:
Tetrahedron Letters. 56:7193-7196
A novel and efficient method for the construction of 4-(3-chromonyl)furo[3,2- c ]-1-benzopyran scaffold by molecular iodine-induced cascade reaction between 3-(1-alkynyl)chromone and 1-(2-hydroxyphenyl)-3- N , N -dimethylaminoprop-2-ene-1-one is desc
Publikováno v:
Tetrahedron Letters. 55:6882-6886
MW-irradiation of a well-ground equimolar mixture of 2-(N-alkynyl-N-aryl)aminochromone-3-carbaldehyde and dimedone underwent domino-Knoevenagel-hetero Diels–Alder (DKHDA) reaction for nonterminal alkynes, whereas conventional heating of the above r
Publikováno v:
Tetrahedron Letters. 55:2924-2928
An efficient and green synthesis of hitherto unreported 5-aryl-3,3-dimethyl-2,3-dihydro-5aH-chromeno[2,3-b]quinoline-1,11(4H,5H)dione has been accomplished by a three-component reaction involving chromone-3-carbaldehyde, an aromatic amine, and 5,5-di
Publikováno v:
Tetrahedron Letters. 54:3466-3470
Syntheses of hitherto unreported 5-aryl-3,3-dimethylchromeno[2,3-b]furo[3,4-d]pyridine-1,11-diones and 6-aryl-4,4-dimethyl-12-oxochromeno[2,3:2′,3′]pyridino[4′,5′-d][1,2]oxazine-2-N-oxide have been accomplished by a metal-free domino-Henry-he
Autor:
Michael G. B. Drew, Pritam Biswas, Tapas Sarkar, Sourav Maiti, Chandrakanta Bandyopadhyay, Jaydip Ghosh
Publikováno v:
Tetrahedron Letters. 54:2221-2225
Synthesis of hitherto unreported 1-benzopyrano[3,2-c]quinolin-12-ones has been accomplished by a ligand-free Pd-catalyzed intramolecular C–H arylation protocol at the C-2 position of a chromone moiety in an Ugi product.
Autor:
Sourav Maiti, Chandrakanta Bandyopadhyay, Koushik Sadhukhan, Suman Kalyan Panja, Jaydip Ghosh
Publikováno v:
Tetrahedron Letters. 53:694-696
2-( N -Alkenyl- N -aryl)aminochromone-3-carbaldehyde undergoes intramolecular Povarov reaction with aromatic amines in the presence of Ph 3 P·HClO 4 to produce chromenonaphthyridine. The effects of substituent and catalyst have been studied. The sub