描述了用⁸2 Se标记的D-和L-硒代蛋氨酸的合成以及Se-甲基上的三个氘(D-和L- [2 H 3,₃2 Se]硒代蛋氨酸)的合成。通过将(R)-和(S)-2-氨基-4-溴丁酸与由金属(82)制得的[2H3,3 -Se]甲基硒酸锂缩合,制得D-和L- [2 H 5,3 -2 Se]硒代蛋氨酸。 Se和[2 H 5]甲基碘。用手性固定相柱通过HPLC测定D-和L- [2 H 5,12 -Se]硒代蛋氨酸的光学纯度,发现ee超过99%。化学电离质谱表明,[2 H 3,⁸2 Se]硒代蛋氨酸的N-异丁氧基羰基乙基酯衍生物的分子相关离子与未标记硒代蛋氨酸的m / z值不重叠。
描述了用⁸2 Se标记的D-和L-硒代蛋氨酸的合成以及Se-甲基上的三个氘(D-和L- [2 H 3,₃2 Se]硒代蛋氨酸)的合成。通过将(R)-和(S)-2-氨基-4-溴丁酸与由金属(82)制得的[2H3,3 -Se]甲基硒酸锂缩合,制得D-和L- [2 H 5,3 -2 Se]硒代蛋氨酸。 Se和[2 H 5]甲基碘。用手性固定相柱通过HPLC测定D-和L- [2 H 5,12 -Se]硒代蛋氨酸的光学纯度,发现ee超过99%。化学电离质谱表明,[2 H 3,⁸2 Se]硒代蛋氨酸的N-异丁氧基羰基乙基酯衍生物的分子相关离子与未标记硒代蛋氨酸的m / z值不重叠。
The present invention relates herbicidal combinations and their use in controlling plants or inhibiting plant growth. In particular, herbicidal combinations of the invention comprise at least one pyridazine derivative of Formula (I) as defined herein, in combination with at least one further herbicide that is a pyrrolidinone derivatives of the Formula (II) as defined herein.
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 D- and L-selenomethionine labeled with ⁸²Se and three deuteriums at Se-methyl group (D- and L-[²H₃, ⁸²Se]selenomethionine) was described. D- And L-[²H₃, ⁸²Se]selenomethionine were prepared by condensation of (R)- and (S)-2-amino-4-bromobutylic acid with lithium [²H₃, ⁸²Se]methaneselenolate, which was prepared from metal (82)Se and [²H₃]methyl iodide. The optical purities of D- and L-[²H₃, ⁸
描述了用⁸2 Se标记的D-和L-硒代蛋氨酸的合成以及Se-甲基上的三个氘(D-和L- [2 H 3,₃2 Se]硒代蛋氨酸)的合成。通过将(R)-和(S)-2-氨基-4-溴丁酸与由金属(82)制得的[2H3,3 -Se]甲基硒酸锂缩合,制得D-和L- [2 H 5,3 -2 Se]硒代蛋氨酸。 Se和[2 H 5]甲基碘。用手性固定相柱通过HPLC测定D-和L- [2 H 5,12 -Se]硒代蛋氨酸的光学纯度,发现ee超过99%。化学电离质谱表明,[2 H 3,⁸2 Se]硒代蛋氨酸的N-异丁氧基羰基乙基酯衍生物的分子相关离子与未标记硒代蛋氨酸的m / z值不重叠。