CC-kupplungen von CO2 mit 1,3-dienen an eisen(0)-komplexen; carboxylatbildung und folgereaktionen
作者:Heinz Hoberg、Klaus Jenni
DOI:10.1016/0022-328x(87)85007-6
日期:1987.3
1,3-Dienes react with CO2 at ligand-iron(0) systems to form η3-allyl carboxylates. The dynamic allylic system is influenced by addition of further ligands such as phosphanes or maleic acid anhydride or acetic acid anhydride. The direction of this influence is shown on the basis of the products generated by protonolysis or insertion of CO2. When substituted 1,3-dienes are used, the 1/1 coupling step
A 4-acylaminopyrazole derivative represented by the following general formula:
wherein R1 is a hydrogen atom, an optionally substituted C1-C16 alkyl group or the like,
R2 and R3 are independently a hydrogen atom, a halogen atom, an optionally substituted C1-C6 alkyl group or the like,
R4 is a hydrogen atom, a C1-C6 alkyl group or a cyano group,
Z is an oxygen atom or a sulfur atom,
Ar is an optionally substituted C6-C14 aryl group or an optionally substituted 5-6 membered unsaturated heterocyclic group,
B is a hydrogen atom, a halogen atom, an optionally substituted C1-C16 alkyl group or the like.
由以下通式代表的 4-酰氨基吡唑衍生物:
其中 R1 是氢原子、任选取代的 C1-C16 烷基或类似基团、
R2 和 R3 独立地为氢原子、卤素原子、任选取代的 C1-C6 烷基或类似基团、
R4 是氢原子、C1-C6 烷基或氰基、
Z 是氧原子或硫原子、
Ar 是任选取代的 C6-C14 芳基或任选取代的 5-6 位元不饱和杂环基团、
B 是氢原子、卤素原子、任选取代的 C1-C16 烷基或类似基团。
Systematic structural modifications in the photochemistry of .beta.,.gamma.-unsaturated ketones. II. Acyclic olefins and acetylenes
作者:Mary A. Schexnayder、Paul S. Engel
DOI:10.1021/ja00850a008
日期:1975.8
Acetolysis of (3,5,5-trimethyl-1-pyrazolin-3-yl)methyl p-bromobenzenesulfonate. Elimination of nitrogen from an azo compound via cationic intermediates
作者:Evan L. Allred、Charles R. Flynn
DOI:10.1021/ja00836a024
日期:1975.2
Courtot, Bulletin de la Societe Chimique de France, 1906, vol. <3>35, p. 302