Zn(OTf)2-Catalyzed Formal [3 + 3] Cascade Annulation of Propargylic Alcohols with 2-Aminochromones: Accessing the Chromeno[2,3- b]pyridines
A Zn(OTf)2-catalyzed formal [3 + 3] cascade annulation strategy for the synthesis of functionalized chromeno[2,3-b]pyridines has been developed using propargylic alcohols and 2-aminochromones as the substrates. The protocol provides a convenien
A Convenient and Practical Synthesis of Aminopyrazoles
A selective methodology for preparing highly substituted aminopyrazoles has been demonstrated. Starting with an acetophenol core, the corresponding substituted isoxazole is prepared in two steps. The isoxazole is transformed into a benzopyran. Alkylation
Mitchell, David,Luo, Yumei,Mcnulty, Lu Anne M.,Buser, Jonas Y.,Mcfarland, Adam D.
supporting information
p. 235 - 241
(2015/05/05)
Synthesis of 2,2′-diaminobischromones using a modified procedure for the rearrangement of 5-(2-hydroxyphenyl)isoxazole to 2-aminochromone
A modified procedure for the rearrangement of 5-(2-hydroxyphenyl)isoxazoles 6a-e to 2-aminochromones 8a-e was developed and this procedure was utilised in the synthesis of hitherto unreported bischromones 3a-c. The isoxazoles 6a-e were prepared regioselec
Synthesis of substituted isoxazoles and 1,3,4-oxadiazoles
A few novel 5-(2'-hydroxyaryl)-isoxazoles 3 and 2-(aryloxymethyl)-3-mercapto-1,3,4-oxadiazoles 8 have been synthesized from the intermediate enamino ketones 2, and tested for their herbicidal activity
Reddy, Kusukuntla Venkat,Sabitha, G.,Subba Rao, A. V.
p. 697 - 699
(2007/10/03)
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