Regio- and Diastereoselective Access to 4-Imidazolidinones via an Aza-Mannich Initiated Cyclization of Sulfamate-Derived Cyclic Imines with α-Halo Hydroxamates
An efficient regio- and diastereoselective cyclization of sulfamate-derived cyclic imines with unsubstituted or monosubstituted α-halo hydroxamates is developed under mild conditions. This reaction proceeds smoothly under transition-metal-free conditions via a domino aza-Mannich addition/intramolecular nucleophilic substitution sequence, providing a convenient route to access 2-monosubstituted and
Compounds of the formula (I) wherein the substituents are as defined in claim 1, useful as a pesticides, especially as herbicides.
式(I)中的化合物,其中取代基如权利要求1中定义的那样,作为杀虫剂特别是除草剂是有用的。
[EN] PRE-HARVEST DESICCATION METHOD<br/>[FR] PROCÉDÉ DE DESSICCATION PRÉ-RÉCOLTE
申请人:SYNGENTA CROP PROTECTION AG
公开号:WO2020164971A1
公开(公告)日:2020-08-20
A method for the pre-harvest desiccation of crop plants which comprises applying to the crop plants an effective amount of a compound of formula (I) or an agronomically acceptable salt or zwitterionic species thereof, wherein the substituents are as defined in claim 1.
Synthesis of 1,4-diazepinone derivatives <i>via</i> a domino aza-Michael/S<sub>N</sub>2 cyclization of 1-azadienes with α-halogenoacetamides
作者:Chunhao Yuan、Hui Zhang、Mengna Yuan、Lei Xie、Xiaoqun Cao
DOI:10.1039/c9ob02626f
日期:——
A novel cyclization of α-halogenoacetamides with 1-azadienes has been developed for the efficient preparation of monocyclic 1,4-diazepinones in one step under transition metal-free conditions. Various α-halogenoacetamides and 1-azadienes are well tolerated and give the desired products in good to excellent yields. This cyclization also demonstrates potential synthetic utility on a gram-scale and further