Reactions of Ruthenium Benzylidene Complexes with Cyclic and Acyclic Imines: Oligomerization of 1-Pyrroline and Metathesis via Tautomerism
作者:Jubo Zhang、T. Brent Gunnoe
DOI:10.1021/om0301029
日期:2003.5.1
ring-opening oligomerization of the cyclicimine. The combination of ruthenium carbene complexes (Cl)2(PCy3)2RuCHPh and (Cl)2(PCy3)(H2IMes)RuCHPh (H2IMes = 1,3-dimesityl-4,5-dihydroimidazolylidene) with acyclic imines of the type (R)NCH(R‘) results in metathesis reactions when the imine possesses a C−H bond α to the imine carbon. Imines that lack C−H bonds α to the imine carbon do not react with (Cl)2(PCy3)2RuCHPh
Reactions of selenium with imines (RR1CNR2) of aldehydes and ketones in the presence of carbon monoxide, water and triethylamine lead to reductive selenation, on aerobic work-up, to afford symmetrical diselenides (RR1CHSe)2 in good to excellent yields. The proposed mechanism suggests that both in situ generated carbonyl selenide (SeCO) and hydrogen selenide (H2Se) are involved in the reaction.
Reactivity of 3-Oxo-β-lactams with Respect to Primary Amines-An Experimental and Computational Approach
作者:Nicola Piens、Hannelore Goossens、Dietmar Hertsen、Sari Deketelaere、Lieselotte Crul、Lotte Demeurisse、Jelle De Moor、Elias Van den Broeck、Karen Mollet、Kristof Van Hecke、Veronique Van Speybroeck、Matthias D'hooghe
DOI:10.1002/chem.201703852
日期:2017.12.19
The reactivity of 3‐oxo‐β‐lactams with respect to primary amines was investigated in depth. Depending on the specific azetidin‐2‐one C4 substituent, this reaction was shown to selectively produce 3‐imino‐β‐lactams (through dehydration), α‐aminoamides (through CO elimination), or ethanediamides (through an unprecedented C3−C4 ring opening). In addition to the experimental results, the mechanisms and