Lysinol: a renewably resourced alternative to petrochemical polyamines and aminoalcohols
作者:Pranit S. Metkar、Mark A. Scialdone、Kenneth G. Moloy
DOI:10.1039/c4gc01167h
日期:——
Lysinol, readily prepared by hydrogenation of aqueous lysine, is proposed as a renewable replacement for petrochemical amines, for example as a hardener in epoxy thermosets.
Transport molecules include a dendrimer and a biologically active molecule. The dendrimer of such transport molecules includes at least one guanidine group, at least one protonated guanidine group, at least one protected guanidine group, at least one amidine group, at least one protonated amidine group, at least one protected amidine group, at least one ureido group, at least one protonated ureido group, at least one protected ureido group, at least one thioureido group, at least one protonated thioureido group, or at least one protected thioureido group. The biologically active molecule is bonded to the dendrimer. A method of increasing the bioavailability of a drug includes bonding the drug to a dendrimer of the invention.
Synthesis and Cytotoxic Activity of Derivatives of 24-NOR-Lupane-Triterpenoid Acids Isolated from Acanthopanax trifoliatus
作者:Nguyen Thanh Tam、Le Thi Hong Nhung、Dao Duc Thien、Tran Van Chien、Tran Van Sung
DOI:10.1007/s10600-015-1261-4
日期:2015.3
Starting from 24-nor-11α-hydroxy-3-oxo-lup-20(29)-en-28-oic acid (1) and 24-nor-3α,11α-dihydroxy-lup-20(29)-en-28-oic acid (2), isolated from the aerial parts of Acanthopanaxtrifoliatus (Araliaceae), 19 new derivatives have been synthesized. Their structures were confirmed by IR, MS, and NMR spectral data. Some of the synthesized compounds have been selected for cytotoxicity test on four human cancer
Novel material forming supramolecular structures, process and uses
申请人:Hayes Wayne
公开号:US20080200718A1
公开(公告)日:2008-08-21
The invention relates to novel material, forming supramolecular structures below its transition temperature, which contains at least one C=O and/or C=S group and at least one N—H, O—H and/or S—H group and wherein the material has the structure
A(—X—B)
n
(1)
wherein A is a cyclic, aromatic and/or aliphatic group, n being a number of 1 to 4, —X—B is, if n is 2, the same or different, and if n is 3 or 4, the same, partly the same or different and has one of the structures (2) to (4)
NH—C(Y)—Y—B (2)
—NH—C(Y)—NR—B (3)
—Y—C(Y)—NR—B (4)
with Y being an Oxygen and/or Sulfur atom, B being an organic group with at least one heteroatom, where the heteroatom is bound to at least two carbon atoms when B is linear or cyclic, and where the heteroatom is bound to at least one carbon atom when B is branched, and R being a Hydrogen atom, a cyclic, aromatic and/or aliphatic group or another B group which is the same or different. The material can be made by reacting at least one isocyanate and/or thioisocyanate with at least one amine, alcohol and/or thiol. Typically, the material is used first below its transition temperature, followed by increasing the temperature to around or above the transition temperature, carrying out a process step and subsequently decrease the temperature below the transition temperature.
Process for the purification of diamines The present invention relates to a process for the purification of diamines obtained by hydrogenation of dinitriles. It relates more particularly to the purification of hexamethylenediamine obtained from the hydrogenation of adiponitrile. The process of the invention consists in treating a portion of the hexamethylenediamine stream withdrawn from the distillation column and in reinjecting this treated stream into the said column.