Henri Rudler

TL;DR: In this article, the aminocarbene complexes (CO)5CrC(R1)N(R2R3)1[R1= H, Me, Ph, R2= Me, R 2R3=(CH2)5, R3 = Me, cyclopropyl] react with diphenylacetylene to give nitrogen ylides 5 which were fully characterized by an X-ray analysis carried out on 5a[(CO)3CrR2r3N(C16H10OR1)

TL;DR: In this paper, the shifts induced by tris(tetraphenylimidodiphosphinato)praseodymium in the 1H n.m. spectra of fatty acids have led to resolve completely the signals of lauric acid, analyse a mixture of four saturated fatty acids, and characterize unsaturated acids, e.g. arachidonic acid, by determining the position and the configuration of the double bonds, and the preferred conformation of the backbone.

TL;DR: In contrast to substituted 4-acetic acid 1,4-dihydropyridines, giving only δ-lactones upon intramolecular reactions, 2-substituted 1,2-Dihydrocaridines led to new, structurally interesting γ lactones as the result of a bromine-induced carbon-carbon double bond 'Umpolung' as discussed by the authors.

TL;DR: Aminocarbene complexes of chromium 1b-d react successively with diphenylacetylene, XH (X = PhS, PhSe, OAc) and finally with pyridine to give a series of functionalized pyrrolinones via N-ylide complexes.

TL;DR: The carbene carbon of 1,4-alkene and -alkyne carbene complexes of chromium and tungsten (1 and 2) reacts with nucleophiles such as hydrides originating from dihydropyridine and methyllithium to give upon CO and alkyne (or alkene) insertions polycyclic lactones 6 and 7, cyclopentanones 10 and 11 as mentioned in this paper.