- Substituted sulfur aromatic heterocyclic compound, preparation method and application thereof
-
The present invention provides a sulfur aromatic heterocyclic compound represented by a formula I, and an optical isomer thereof, wherein Y is an anion, R1 is NR4R5, hydrogen, halogen, a C1-C4 alkyl group, a C1-C4 alkoxy group, a trifluoromethoxy group
- -
-
Paragraph 0049-0055
(2020/11/23)
-
- Stabilizers for color photography recording materials
-
Tetrahydrothiopyran compound of the formula I STR1 in which R1, R2, R3, R4, R5, R6, X and n are as defined in claim 1, are effective stabilizers for dyes and dye couplers in photographic layers. In particular, they provide protection from damage by light. They are preferably used in combination with a phenolic antioxidant.
- -
-
-
- Use of carbon-sulfur cathodes in electro-organic chemistry - Part 2 - Reactions with activated alkenes; evidence for a vicarious substitution specific of this type of electrode.
-
The sulfur-carbon electrode, used as a cathode, appears to be an excellent source of nucleophiles which are good sulfuration reagents towards alkenes not substituted by leaving groups.However, the electrochemical reactions are often complex.It should be w
- Guillanton, G. Le,Do, Q. T.,Simonet, J.
-
p. 427 - 439
(2007/10/02)
-