Enantiomerically pure disulfides: key compounds in the kinetic resolution of chiral PIII-derivatives with stereogenic phosphorus

Synthesis and Biological Activity of Unsymmetrical Monoterpenylhetaryl Disulfides

New unsymmetrical monoterpenylhetaryl disulfides based on heterocyclic disulfides and monoterpene thiols were synthesized for the first time in 48–88% yields. Hydrolysis of disulfides with fragments of methyl esters of 2-mercaptonicotinic acid was carried out in 73–95% yields. The obtained compounds were evaluated for antioxidant, antibacterial, antifungal activity, cytotoxicity and mutagenicity.

Regioselective and stereoselective cleavages of P–S/C–S bonds by lithium and the formation of P-stereogenic functional phosphine derivatives

Various menthyl-containing phosphinothioates were prepared.

Medium-sized cyclic bis(anisylphosphonothioyl)disulfanes and their corresponding cyclic sulfane-structures and most characteristic reactions

A family of cyclic medium-sized disulfanes and related sulfanes was synthesized and characterized, followed by desulfurization and disulfane ammonolysis.

Chiral iridium(iii) complexes with four-membered Ir–S–P–S chelating rings for high-performance circularly polarized OLEDs

CP-OLEDs with two series of chiral iridium(iii) complexes based on four-membered Ir–S–P–S chelating rings and chiral BINOL-based derivatives show excellent electroluminescence performances with obvious CPEL properties.

(R(P))-5-Methyl-2-(propan-2-yl)cyclo-hexyl phen-yl{phen-yl[(1-phenyl-eth-yl)amino]-meth-yl}phosphinate

In the title compound, C₃₁H₄₀NO₂P, the P atom has a distorted tetra­hedral stereochemistry [bond-angle range about P = 103.33 (6)–115.24 (15)°] and has R_P chirality, which was confirmed crystallographically. The dihedral angles between the P-bonded phenyl ring and the other two phenyl rings are 40.4 (3) and 12.2 (2)°. In the crystal, a C—H⋯O inter­action links mol­ecules into chains which extend along [100].

Sulfurization of dinucleoside phosphite triesters with chiral disulfides

Sixteen chiral analogues of phenylacetyl disulfide (PADS) and 5-methyl-3H-1,2,4-dithiazol-3-one (MEDITH) were used to sulfurize five dithymidine phosphite triesters, each incorporating a β-cyanoethoxy or siloxy group. Each mixture of S(P):R(P) phosphite triester diastereomers was combined with approximately one fourth of an equivalent of each of the sulfurizing reagents, and the R(PS):S(PS) diastereomer ratios of the resulting phosphite sulfides or phosphorothioates were determined by reverse-phase HPLC. Diastereoselectivities and corresponding diastereomeric excess (de) values were calculated by correcting for the starting triester diastereomer ratios. The highest de values for R(PS) and S(PS) phosphorothioates were 14.7% and 7.9%, respectively, both using MEDITH analogues.

(RP,RP)-Bis[(3-menthyloxy)(phenyl)phosphinoyl] disulfide

The molecule of the title compound, C₃₂H₄₈O₄P₂S₂, has 2 symmetry, the mid-point of the S—S bond being located on a twofold rotation axis. The two tetra­hedral P units are linked by a S—S bond with a P—S—S—P torsion angle is 131.19 (6)°. The dihedral angle between two phenyl rings is 12.66 (13)°. The cyclo­hexane ring of the menthoxyl group displays a chair conformation. Weak inter­molecular C—H⋯O hydrogen bonding is present in the crystal structure.

Bis(diphenylphosphorothioyl) trisulfide

In the title compound, C24H20P2S5, the P atoms are arrangedtranswith respect to the S3group and the S=P—S—S systems havecisoidgeometry, with an average S—P—S—S torsion angle of −56.7°. The dihedral angles between the two phenyl rings attached to the P atoms are 87.33 (12) and 75.67 (10)°. In the crystal structure, the molecules are linked into chains running parallel to theaaxis by weak intermolecular C—H...S hydrogen bonds. Centrosymmetrically related chains are further connected by π–π stacking interactions, with a centroid-to-centroid distance of 3.795 (5) Å.

Enantiomerically pure P-chiral phosphinoselenoic chlorides: inversion of configuration at the P-chirogenic center in the synthesis and reaction of these substances

Reaction of diastereomerically pure phosphinoselenoic acid salts with oxalyl chloride leads to enantiomerically pure P-chiral phosphinoselenoic chlorides with inversion of configuration at phosphorus; one of these chlorides is converted to a phosphinoselenothioic acid salt with a high degree of enantioselectivity.