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

A facile synthesis of l,3,4,5-tetramethyl-2-methylenimidazoline 5 (Im) starting from the pentamethylimidazolium ion (8) and KH is described. Boranes react with 5 to give the adducts ImBHi 3  (11) and ImBF 3  (18). With Mel and CH 3 C(O)Cl the imidazolium salts ImMe +  (19) and ImC(O)Me +  (20) are obtained. CS 2  gives the zwitterionic compound ImCS 2  (24) which is transformed into the cationic thiocarboxylic ester ImC(S)SCH 2 Cl +  on treatment with CH 2 Cl 2 . Reaction with chlorotrimethylsilane gives the imidazolium ion ImSiMe +  3  (26) which may be transferred into the disilylated imidazolium ion 28 via deprotonation and subsequent silylation, the silylated olefin 27 being the intermediate. Similarly, the cations ImSiR 2 Cl +  (29; R = Me, Ph) are obtained from 5 and the silanes R 2 SiCl 2 . The neutral adduct ImSnPh 2 Cl 2  (32) is formed in the reaction of 5 with Ph 2 SnCl 2 . Iodine reacts with 5 to give the charge-transfer adduct Iml 2  (35), which can be further transferred into the imidazolium salt Iml + I -  3  (36).

zeitschrift für naturforschung b

1,3,4,5-Tetramethyl-2-methylenimidazolin - ein Olefin mit Ylid-artigen Eigenschaften [1] / 1,3,4,5-Tetramethyl-2-methylenimidazoline - an Olefin with Ylidic Properties [1]