Salt‐free Synthesis of Azo and Hydrazone Dyes Under CO 2  Pressure | Zendy

Raue Roderich | Zendy; Brack Alfred | Zendy; Lange Karl H. | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Premium

Salt‐free Synthesis of Azo and Hydrazone Dyes Under CO 2 Pressure

Author(s) -

Raue Roderich,

Brack Alfred,

Lange Karl H.

Publication year - 1991

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.199116431

Subject(s) - hydrazone , chemistry , salt (chemistry) , nitrous acid , organic chemistry , atmospheric pressure , combinatorial chemistry , geology , oceanography

A large ecological advantage is evident in the synthesis of azo dyes according to Equation (a). The nitrous acid is released from its salts or esters by CO 2 pressure, which reduces the quantity of salts produced as side products considerably. Heterocyclic amines can also be diazotized successfully in this one‐step reaction and coupled quantitatively with tertiary aromatic amines (e.g. R 1 = 3,4‐diazapyrrol‐2‐yl. R 2 = ethyl, R 3 = benzyl).

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research