- A disulfide derivative and its preparation method and application
-
The invention relates to sulfide derivatives. The preparation method comprises the following steps: in a water system, by taking sodium sulphide and powdered sulfur as raw materials, carrying out heating reflux to synthesize a sodium disulfide aqueous sol
- -
-
Paragraph 0025-0027
(2017/12/28)
-
- Effect of nitro-substituton on the photochemistry of 3-piperidino-1,2-benzisothiazole derivatives: A mechanistic investigation
-
Photochemical isomerization of 3-piperidino-1,2-benzisothiazole (BIT)-benzothiazole (BT) was investigated. In particular, the effect of nitro-substitution on the benzene ring was selectively examined for the parent, 5-nitro-, and 7-nitro-derivatives. 3-Piperidino-BIT and nitro-3-piperidino-BIT isomerized irreversibly to the corresponding 2-piperidino-BT, and this reaction mechanism was investigated using density-functional theory (DFT) and time-dependent (TD)-DFT calculations. These calculations showed that this isomerization goes through an azirine intermediate. In addition, excitation wavelength effect demonstrates that isomerization occurs from the upper excited state of nitro-derivatives. The HOMO-LUMO transition has charge-transfer and photoinactive characters.
- Tanikawa, Hiroharu,Ishii, Kazuhiro,Kubota, Shun,Sasanuma, Takashi,Yagai, Shiki,Kitamura, Akihide,Karatsu, Takashi
-
experimental part
p. 659 - 674
(2010/09/07)
-
- PROCESS FOR THE PREPARATION OF 6-(PERFLUOROALKYL)URACIL COMPOUNDS FROM CARBAMATE COMPOUNDS
-
An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having structural formula (I) from carbamate compounds having structural formula (II).
- -
-
-
- Processes and intermediate compounds for the preparation of 2-(N,N-disubstituted) amino-4-(perfluoroalkyl)-1, 3- oxazin-6-one and 6-(perfluoroalkyl) uracil compounds
-
An improved process and intermediate compounds for the preparation of 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula I and an improved process for the preparation of 6-(perfluoroalkyl)uracil compound
- -
-
-
- Herbicidal 3 -heterocyclic substituted benzisothiazole and benzisoxazole compounds
-
There are provided 3-heterocyclic substituted benzisothiazole and benzisoxazole compounds having the structural formula I where Q, X, X1 and Z are defined as in claim 1. Further provided are compositions and methods comprising those compounds for the control of undesirable plant species.
- -
-
-
- Process for the preparation of 6-(perfluoroalkyl) uracil compounds form urea compounds
-
An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I from urea compounds having the structural formula II
- -
-
-
- Process for the preparation of 6-(perfluoroalkyl) uracil compounds from 2-(N,N-disubstituted) amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds
-
An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I from 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula II
- -
-
-
- 3-(1,2-benzisothiazol- and isoxazol-5-Y1)-2,4(1H,3H)-pyrimidinedione or thione and 3-(1,2-benzisothiazol- and isoxazol-5-y1)-4(3H)-pyrimidinone or thione herbicidal agents
-
There are provided 3-(1,2-benzisothiazol- and isoxazol-5-yl)-2,4(1H,3H)-pyrimidinedione or thione compounds of formula I and 3-(1,2-benzisothiazol- and isoxazol-5-yl)-4(3H)-pyrimidinone or thione compounds of formula II Further provided are compositions and methods comprising those compounds for the control of undesirable plant species.
- -
-
-