The reaction of 5,6-dihydro-4H-1,2-oxazines, which are derived from α-bromooximes and enamines, with ironcarbonylcomplexes such as Fe3(CO)12 and (C2H5)3NH[HFe3(CO)11] gives pyrrole derivatives in high yields, accompaning deoxygenation from the oxazines. The pyrroles are also obtained by an one-pot reaction using α-bromooximes, enamines and ironcarbonyls.
(2-imidazolin-2-yl) fused heteropyridine compounds, intermediates for
申请人:American Cyanamid Company
公开号:US05252538A1
公开(公告)日:1993-10-12
There are provided novel (2-imidazolin-2-yl) fused heteropyridine compounds, and intermediate compounds for the preparation thereof, and a method for controlling a wide variety of annual and perennial plant species therewith.
Hydroxylated inhibitors of HIV reverse transcriptase
申请人:MERCK & CO. INC.
公开号:EP0481802A1
公开(公告)日:1992-04-22
Novel biotransformed or synthetic hydroxy pyridinones inhibit HIV reverse transcriptase, and are useful in the prevention or treatment of infection by HIV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts (where appropriate), pharmaceutical composition ingredients, whether or not in combination with other antivirals, anti-infectives, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.
Synthesis and Reactions of Haloazodienes. A New and General Synthesis of Substituted Pyridazines
作者:Michael S. South、Terri L. Jakuboski、Mark D. Westmeyer、Daniel R. Dukesherer
DOI:10.1021/jo960029e
日期:1996.1.1
tetrahydropyridazines that are formed give high yields of substituted pyridazines upon treatment with base (Table 1). The sequence of a chloroazodiene cyclization to a tetrahydropyridazine followed by an aromatization constitutes a new and generalsynthesis of substituted pyridazines. In contrast to the haloazodiene cyclizations, the novel cyclization reactions of the in-situ generated 1-carbethoxy-3-phenyl-4
4-dihydropyrimidine derivatives as pyrimidinenucleoside analogues was developed, starting from 3-nitropyran-2-one N-functionalized amidines. Primary amines were reacted with amidines yielding 4-nitromethylene-1,4-dihydropyrimidine derivatives. In an initial survey, several 4-nitromethylene-1,4-dihydropyrimidines turned into 4-nitromethylene-1,2,3,4-tetrahydropyrimidine derivatives under different reduction