Hydrazyl radicals, initiated by DPPH, reacted with α,β-unsaturated ketones without any good leaving group on their β-positions to yield pyrazoles regio-selectively.
Optical resolution of 1,3-dimethyl-5-phenyl-Δ<sup>2</sup>-pyrazoline by diastereoisomeric complex formation with an optically active host compound: X-ray and molecular structure of the complex
作者:Fumio Toda、Koichi Tanaka、Lourdes Infantes、Concepción Foces-Foces、Rosa M. Claramunt、José Elguero
DOI:10.1039/c39950001453
日期:——
The first example of optical resolution of a non-functionalized Δ2-pyrazoline is reported using (R,R)-(–)-trans-4,5-bis(hydroxydi-o-tolylmethyl)-2,2-dimethyl-1,3-dioxacyclopentane as host; the X-ray analysis carried out at 200 K shows that the crystal contains the S enantiomer of 1,3-dimethyl-5-phenyl-Δ2-pyrazoline.
SUBSTITUTED N-HETEROCYCLYL- AND N-HETEROARYL-TETRAHYDROPYRIMIDINONES AND THE SALTS THEREOF, AND THE USE OF SAME AS HERBICIDAL ACTIVE SUBSTANCES
申请人:Bayer Aktiengesellschaft
公开号:US20200390100A1
公开(公告)日:2020-12-17
The present invention relates to substituted N-heterocyclyl- and N-heteroaryltetrahydropyrimidinones of the general formula (I) or salts thereof,
where the radicals in the general formula (I) correspond to the definitions given in the description, and to the use thereof as herbicides, in particular for controlling broad-leaved weeds and/or weed grasses in crops of useful plants and/or as plant growth regulators for influencing the growth of crops of useful plants.