The recent ability to manipulate and visualize single atoms at atomic level has given rise to modern bottom-up nanotechnology. Similar exquisite degree of control at the individual polymeric chain level for producing functional soft nanoentities is expected to become a reality in the next few years through the full development of so-called "single chain technology". Ultra-small unimolecular sof...

The crystal structure of the title compound, C(25)H(31)NO(3), exists in a twin-chair conformation with an equatorial orientation of the ortho-eth-oxy-phenyl groups. According to Cremer and Pople [Cremer & Pople (1975 ▶), J. Am. Chem. Soc. 97, 1354-1358], both the piperidone and cyclo-hexa-none rings are significantly puckered with total puckering amplitutdes Q(T) of 0.5889 (18) and 0.554 (2) Å,...

The dinuclear title compound, [Ag2(C14H22N4O2)(C18H15P)2(H2O)2](NO3)2, lies across an inversion center and consists of two [Ag(H2O)(PPh3)] units bridged by a bis-(cyclo-hexa-none)oxalydihydrazone ligand. The charge-balance is supplied by two nitrate anions. The symmetry-unique Ag(I) ion is in a distorted tetra-hedral geometry coordinated by a P atom from a tri-phenyl-phosphane ligand, an O atom...

The title compound, C(18)H(27)N(3)O, is a derivative of the anti-tuberculosis drug isoniazid (systematic name: pyridine-4-carbohydrazidei). The crystal structure consists of repeating C(4) chains along the b axis, formed by N-H⋯O hydrogen bonds with adjacent amide functional groups that are related by a b-glide plane. The cyclo-dodecyl ring has the same approximately 'square' conformation, as s...

The evolution of polymer based nanoparticles as a drug delivery carrier via pharmaceutical nano/microencapsulation has greatly promoted the development of nano- and micro-medicine in the past few decades. Poly(lactide-co-glycolide) (PLGA) and chitosan, which are biodegradable and biocompatible polymers, have been approved by both the Food & Drug Administration (FDA) and European Medicine Ag...

The title compound, C(23)H(18)N(2)O(6), is the product of an intra-molecular thermal cyclo-addition within 1-malein-2-[(E)-2-(2-fur-yl)vin-yl]-4-oxo-3,4-dihydro-quinazoline. The mol-ecule comprises a previously unknown fused penta-cyclic system containing two five-membered rings (2-pyrrolidinone and furan) and three six-membered rings (benzene, 2,3-dihydro-4-pyrimidinone and dihydro-cyclo-hexa-...

Single crystals of the title compound bis[bis-(1-ethyl-3-methyl-imidazol-2-yl-idene)silver(I)] 1,5,5,7,11,11-hexa-chloro-2,8-di-oxa-4,6,10,12,13,14-hexa-aza-1λ(5),3,5λ(5),7λ(5),9,11λ(5)-hexa-phospha-tricyclo-[7.3.1.1(3,7)]tetra-deca-1(13),4,7(14),10-tetra-ene-6,12-diide 3,9-dioxide, [Ag(C(6)H(10)N(2))(2)](Cl(6)N(6)O(4)P(6))(0.5), were isolated from the reaction of the silver N-heteocyclic carbe...

Nanotechnology is the new emerging technology in the drug discovery and it has the property of self targeting in the sense that without the attachment of a specific ligand, the nanoparticles can be used for targeting, due to their distinctively small size, at the infected pathological areas. Drug delivery system fetched a novel drug delivery system, a novel approach to overcome the drawbacks of...

Abstract Under different concentrations of the base potassium deuteroxide KOD, progress reactions, such as enolization, D‐substitution, isomerization, and conformational changes diketopiperazine cyclo(L‐Pro‐L‐Xxx) cyclo(D‐Pro‐L‐Xxx) (Xxx = Phe, Tyr) in D 2 O solution, was investigated by 1 H nuclear magnetic resonance (NMR). Cyclo(L‐Pro‐L‐Xxx) is mostly isomerized to whereas only slightly even ...