English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Orthoamides of alkyne carboxylic acids  17  react with 1,2- and 1,3-dioles to give vinylogous cyclic urea acetals. Analogous reactions with ethandithiol deliver vinylogous thioureas. The condensation of orthoamides  17  with 3,5-dimethyl-4-nitroisoxazol affords 1,1-diamino-butadiene derivatives. From nitro acetaldehyde diethylacetal and orthoamides  17  can be prepared reactive vinylogous urea acetals, which condense with cyano-acetic acid ester under formation of 7,7-diamino-2,4,6-hexatrienecarboxylic acid esters. 5,5-Bis(dimethylamino)-2-nitro-2,4-butadienecarboxylic acid esters, which are accessible from the orthoamides  17  and nitro acetic ester, cyclize to give 5-dimethylamino-pyrrole-2-carboxylic acid esters on treatment with zinc/acetic acid.

Orthoamide und Iminiumsalze, CIX. Umsetzungen von Orthoamiden der Alkincarbonsäuren mit Diolen, Ethandithiol und CH-aciden Nitroverbindungen