A Carbon-Carbon Bond Formation by the Reaction of 4-Chloro-6-methyl-3-phenylethynyl-2H-pyran-2-one with Active Methylene Derivatives
摘要:
The reaction of 4-chloro-6-methyl-3-phenylethynyl-2H-pyran-2-one (2) with compounds containing active methylene group, such as diethyl malonate, acetylacetone, ethyl cyanoacetate, and malononitrile, in the presence of NaH gives 4-substituted 6-methyl-3-phenylethynyl-2H-pyran-2-one(3) and/or 6-methyl-3-phenylacetyl-2H-pyran-2-one (5).
Synthesis of Pyrano[4,3-b]benzodiazepine and Pyrano[4,3-b]quinoline Using 4-Chloro-3-(1-chlorovinyl)-6-methyl-2H-pyran-2-one and 4-Chloro-3-ethynyl-6-methyl-2H-pyran-2-one
摘要:
Reaction of dichloropyrone (1) and chloroethynylpyrone (2) with o-phenylenediamine and m-phenylenediamine give pyranobenzodiazepine (3) and pyranoquinoline (5), respectively. Treatment of 1 and 2 with p-phenylenediamine yield aminoethynylpyrone (6), which is a key product in the reaction of 1 and 2 with phenylenediamines.
A Synthesis of 7-Substituted 1H-Pyrano[4,3-b]quinoline Derivatives
作者:Yutaka Azuma、Atsuko Sato、Mieko Morone
DOI:10.3987/com-94-6721
日期:——
The reaction of 4-chloro-3-ethynyl-6-methyl-2H-pyran-2-one (2) with aniline derivatives having a electron-donating group at the 3-position in EtOH gives 7-substituted 1H-pyrano[4,3-b]quinolin-1-one derivatives (3).