Synthesis, isomer separation, and metal complexation studies of aza- and oxaphosphands, a class of hard/soft dinucleating phosphine macrocycles

Glymes as versatile solvents for chemical reactions and processes: from the laboratory to industry

“…Hwever, the use to monoglyme as the solvent gave a lower product ratio. In the synthesis of asymmetric phosphine macrocycles, Wei et al 198 eliminated the protecting tosyl groups at −78 °C by sodium naphthalenide in monoglyme containing t -butyl alcohol (as a proton source); this method was used by the same group in an earlier detosylation study. 199 …”

“…However, the use of monoglyme as the solvent gave a lower product ratio. In the synthesis of This journal is © The Royal Society of Chemistry 2014 asymmetric phosphine macrocycles, Wei et al 198 eliminated the protecting tosyl groups at À78 C by sodium naphthalenide in monoglyme containing t-butyl alcohol (as a proton source); this method was used by the same group in an earlier detosylation study. 199 Partial reduction of a lactam to produce the indole alkaloid roxburghine D was achieved by using di-isobutyl aluminium hydride in monoglyme at À70 C. 200 Dahl et al 201 prepared CH 3 Ge(PH 2 ) 2 H and CH 3 Ge(PH 2 ) 3 by the reaction of CH 3 GeCl 3 with LiAl(PH 2 ) 4 in triglyme at À23 C. Saavedra 202 carried out the reduction of nitrosoamides to alcohols using NaBH 4 in dry monoglyme at room temperature for 2-8 h, achieving 50-82% yields (Scheme 8).…”

Thermal and photoassisted ring opening of thietane in a triosmium cluster complex

“…Chem. 1982 2.7 (1) 0(11) 1.1649 (8) 0.0790 (5) 0.7080 (6) 5.5 (5) 0(12) 0.9362 (8) 0.2925 (5) 0.6888 (6) 4.9 (4) 0(13) with suitable couplings to the hydride ligand. This molecule was apparently formed by the loss of an Os(CO)4 fragment from 2 and CH activation on the carbon atom that was -bonded to the metal atom.…”

Aromatic λ3 heterocycles XIV. Fosfinine-ether macrocyclesheterocycles XIV. Fosfinine-ether macrocycles

“…Phosphinine ether macrocycles, the analogues of phosphine-ether macrocycles are designed as flexible and selective ligands in view to obtain host-guest complexes with metal cations [3]. Even if crown ethers and phosphine-ether macrocycles display interesting coordinative behavior towards metals or neutral molecules, due to optical isomerism of phosphorus atoms they posses many practical problems [5][6][7][8][9][10][11][12][13]. The aromatic character of phosphinine was demonstrated earlier by structural and magnetic criteria and also by spectral investigation [14][15][16][17][18].…”