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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Trichloroacetaldehyde was successfully used for the cyclisation of bis-amidines of oxalic acid 1 to afford cycloaminals in good yields. Although prototropism is a characteristic feature of the amidines the cyclisation reaction can be realized in a regioselective manner to give three types of cycloaminals 6, 7 and 8. Starting from cycloaminals 8 carbenes can be generated which immediately dimerize to the corresponding 2,3,6,7-tetrakis(arylamino)-1,4,5,8-tetraazafulvalenes 5.

Cycloaminals of trichloroacetaldehyde: synthesis and their use as carbene-precursors