Synthesis of 2-substituted 3, 4-dihydro-2H-1,4-benzoxazines through ligandless copper-catalyzed cyclization of hydroxysulfonamides under phase-transfer catalysis conditions

Autor:	Domenico Albanese, M. Penso, Davide Scaletti, Vittoria Lupi, Dario Landini
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Bromine Process Chemistry and Technology Aryl Leaving group chemistry.chemical_element Ring (chemistry) Copper Catalysis Sulfonamide chemistry.chemical_compound chemistry Polymer chemistry Moiety Organic chemistry Physical and Theoretical Chemistry
Zdroj:	288 (2008): 28–32. info:cnr-pdr/source/autori:Albanese, D.; Landini, D.; Lupi, V.; Penso, M.; Scaletti, D./titolo:Synthesis of 2-substituted 3, 4-dihydro-2H-1,4-benzoxazines through ligandless copper-catalyzed cyclization of hydroxysulfonamides under phase-transfer catalysis conditions/doi:/rivista:/anno:2008/pagina_da:28/pagina_a:32/intervallo_pagine:28–32/volume:288
Popis:	The ring closing under solid–liquid phase-transfer catalysis conditions (SL-PTC) of hydroxysulfonamides 7 , bearing a leaving group in the ortho position of the aryl moiety, generates 2-substituted-3,4-dihydro- 2H -1,4-benzoxazines 4 in good to excellent yields. In the case of hydroxysulfonamides 7 bearing a bromine or iodine atom as a leaving group, a copper(I) salt is used to enable the reaction to occur.
Databáze:	OpenAIRE
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