A method is suggested for isomerization of alpha-acetylenic ketones with migration of the oxo group from position 1 to position 3 and of the triple bond from position 2 to position 1 of the ketoacetylenic fragment; it consists of addition of Et2NH at the triple bond of the ketone, conversion of the adduct to the imminium salt with POCl3, followed by alkaline hydrolysis. The isomerization is achieved in one preparative stage without isolation of intermediate compounds.
A method is suggested for isomerization of alpha-acetylenic ketones with migration of the oxo group from position 1 to position 3 and of the triple bond from position 2 to position 1 of the ketoacetylenic fragment; it consists of addition of Et2NH at the triple bond of the ketone, conversion of the adduct to the imminium salt with POCl3, followed by alkaline hydrolysis. The isomerization is achieved in one preparative stage without isolation of intermediate compounds.
作者:A. S. Zanina、S. I. Shergina、I. E. Sokolov、R. N. Myasnikova
DOI:10.1007/bf00698504
日期:1995.4
A simple route for the synthesis of 1,3-diketones by the reaction of acetylenic ketones with amines followed by hydrolysis of the resulting aminovinylketons is suggested.
Isomerization of ?-acetylenic ketones
作者:M. S. Shvartsberg、L. G. Fedenok
DOI:10.1007/bf00958259
日期:1990.9
A method is suggested for isomerization of alpha-acetylenic ketones with migration of the oxo group from position 1 to position 3 and of the triple bond from position 2 to position 1 of the ketoacetylenic fragment; it consists of addition of Et2NH at the triple bond of the ketone, conversion of the adduct to the imminium salt with POCl3, followed by alkaline hydrolysis. The isomerization is achieved in one preparative stage without isolation of intermediate compounds.