α-Substitution Effects on the Ease ofS→N-Acyl Transfer in Aminothioesters
摘要:
In S‐acylcysteines and homocysteines, the efficacy and rate of S→N‐acyl transfer (5 and 6 cyclic TSs) vary with the size of S‐acyl group. Conformational and quantum chemical calculations indicate that the spatial distance, b(N‐C), between the terminal amine and the thioester carbon is shortened by α‐C(O)X (X = OH, OMe, NH2) substituents.
Amides of N-(3-(1-chloro-2-nitroethenylthio)propane)
申请人:Shell Oil Company
公开号:US04606862A1
公开(公告)日:1986-08-19
A process for preparing insecticidal N-acyl-tetrahydro-2-nitromethylene-2H-1,3-thiazines, intermediates involved therein and certain of the products.
一种制备杀虫N-酰基四氢-2-硝基亚甲基-2H-1,3-噻唑啉,其中涉及的中间体和某些产物的过程。
Process for preparing N-substituted nitromethylene heterocyclic compounds
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0134615A1
公开(公告)日:1985-03-20
A process for preparing an N-substituted nitromethylene heterocyclic compound of the following general formula:-
wherein n is 2, or 4 and R is an optionally-substituted acyl group derived from an organic acid, characterised in that an N-substituted-S-substituted aminothiol of the following general formula:
wherein R and n have the meanings hereinbefore specified and Hal is a halogen atom, is reacted with a base, preferably an alkali metal or alkaline earth metal hydride or alkoxide or an alkali metal amide, in the presence of an inert solvent.
一种制备通式如下的 N-取代的硝基亚甲基杂环化合物的工艺
其中 n 为 2 或 4,R 为由有机酸衍生的任选取代的酰基,其特征在于下式通式的 N-取代-S-取代氨基硫醇:
其中 R 和 n 的含义如前所述,Hal 为卤素原子,在惰性溶剂存在下与碱,最好是碱金属或碱土金属氢化物或碱氧化物或碱金属酰胺反应。
Novel pesticidal heterocyclic compounds
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0135956A2
公开(公告)日:1985-04-03
N-substituted heterocyclic compounds having insecticidal activity of the following general formula:
wherein n=2, 3 or 4 and R is an optionally-substituted acyl group selected from the following:
aroyl
carbamoyl
aryloxycarbonyl
arylthiocarbonyl
alkylthio-thiocarbonyl
arylthio-thiocarbonyl
arylsulphonyl
alkylsulphinyl
arylsulphinyl
alkylaminosulphonyl
arylaminosulphonyl
alkylaminosulphinyl
arylaminosulphinyl
or a phosphorus-containing acyl group of the following formula:
wherein each R° independently is an optionally substituted alkyl or aryl group, each X independently is an oxygen or sulphur atom and each y independently is 0 or 1.