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

The cyclopropanation of olefins with 2-diazodimedone 1a and the corresponding phenyliodonium ylide 1b in the presence of selected chiral Cu(I)- and Rh(II)-catalysts proceeds without significant enantioselectivity. Contrary to previous reports in the literature, the cyclopropanation of styrene with 1a in the presence of [Cu{(+)-facam}2] is not enantioselective. While the transition metal catalyzed 1,3-dipolar cycloaddition of 2-diazodimedone (1a) to furan and dihydrofuran is equally non-selective, the introduction of heteroatoms and/or unsaturation in the carbene precursor results in slightly enhanced enantioselectivity.

arkivoc

Selectivity in cyclopropanations and 1,3-cycloadditions in transition metal-catalyzed decompositions of 2-diazocyclohexane-1,3-diones and the corresponding phenyliodonium ylides