Preparation and Properties of 2-Dialkylamino-5-haloacetyl-thiazoles and 4-(2-Dialkylamino-5-thiazolyl)-thiazoles. -Haloacetyl thiazoles, e.g. (VII), can be used for the preparation of deeply colored dyes such as (XIII) and (XV).
Preparation and properties of 2-Dialkylamino-5-haloacetyl-thiazoles and 4-(2-Dialkylamino-5-thiazolyl)-thiazoles
✍ Scribed by Cornelia Mokry; Prof. Dr. Horst Hartmann
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 618 KB
- Volume
- 340
- Category
- Article
- ISSN
- 1615-4150
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## Abstract By condensation of squaric acid (1) with 2‐(dialkylamino)‐substituted thiazoles 8 a novel type of heterocyclic‐substitued squaraines of the general structure 9 was prepared in moderate yield mostly. The squaraines 9 obtained are sparingly soluble in the most organic solvents and exhibit
The readily available 2-substituted 5-acetyl-4-thiazolyl with 1-alkynes/6-endo-dig annulation reactions in the presence of ammonia leads to functionalised pyrido[3,4-triflates 2 are useful building blocks for the preparation of functionalised thiazoles by means of palladium-catalysed c]thiazoles in
## Abstract By the reaction of weak bases with __N__(2)‐disubstituted 2‐amino‐4‐thiazoliniminium chlorides 3, easily available by the reaction of thioureas 1 with α‐chloroacetonitrile 2, __N__(2),__N__(2′)‐persubstituted 2,4‐diamino‐5‐(2‐amino‐4‐thiazolyl)thiazoles 8 are formed. These new bis‐thiaz