New nitric oxide-releasing zwitterions derived from polyamines
摘要:
The reaction of nitric oxide (NO) with polyamines has been studied, resulting in the discovery of a new type of NO-releasing compound having the structure RN[N(O)NO]-(CH2)xNH2+R' (3). Numerous examples of these zwitterionic polyamine/NO adducts have been prepared and found to be very stable solids which release NO in solution. The new compounds contain as much as 45% NO by weight and are capable of releasing it all at rates which have been shown to vary in a predictable way with structure. The half-lives in buffered aqueous solution at pH 7.4 and 22-degrees-C were shown to vary from extremely short (1.3 min for diamine 8, MeN[N(O)NO]-(CH2)4NH2+Me) to very long (56 h for triamine 18, H2NCH2CH2N[N(O)NO]-CH2CH2NH3+). In general, the longest half-lives were achieved by triamine/NO adducts and derivatives of ethylenediamine (x = 2). For any given value of x, a small increase in the size of R resulted in a relatively large increase in half-life but changes in R' appeared to have little effect. Data are presented which should allow the selection of the proper compounds to achieve a wide range of desired NO generation rates. These NO-containing zwitterions should prove to be important resources in studies of the biology of NO and may also have important pharmaceutical and chemical applications.
Cyclic urea and thiourea derivatives as inducers of murine erythroleukemia differentiation
作者:Chau-Der Li、Sharon L. Mella、Alan C. Sartorelli
DOI:10.1021/jm00141a015
日期:1981.9
differentiation of Friend erythroleukemia cells, has been synthesized and tested for its capacity to induce erythroid maturation, as measured by the synthesis of hemoglobin. Cyclic urea and thiourea derivatives consisting of five-, six-, and seven-memberedring systems containing N-alkyl substituents were prepared. Most of these agents were relatively effective inducers od differentiation, with N-alkyl
Phosphino-amine (PN) Ligands for Rapid Catalyst Discovery in Ruthenium-Catalyzed Hydrogen-Borrowing Alkylation of Anilines: A Proof of Principle
作者:Lewis Marc Broomfield、Yichen Wu、Eddy Martin、Alexandr Shafir
DOI:10.1002/adsc.201500562
日期:2015.11.16
A general synthetic protocol for the synthesis of simple phosphino-amine (PN) ligands is described with 19 ligands being isolated in good yields. High-throughput ligand screening uncovered the success of two of these ligands for aromatic amine alkylations via ruthenium-catalyzedhydrogen borrowing reactions. The combination of N,N′-bis(diphenylphosphino)-N,N′-dimethylpropylenediamine with a ruthenium(II)
[EN] METHOD FOR PATHOGENS, MICROORGANISMS, AND PARASITES INACTIVATION<br/>[FR] PROCÉDÉ D'INACTIVATION DE PATHOGÈNES, DE MICROORGANISMES ET DE PARASITES
申请人:ZATA PHARMACEUTICALS INC
公开号:WO2020023881A1
公开(公告)日:2020-01-30
The invention provides a method for inactivation or reduction of pathogens, microorganisms or parasites in a sample, media, composition, utility, device, surface or organism by treatment with an alkylating compound of Structure I, followed by elimination or reduction of the residual compound with Structure I by treatment with a neutralizing agent, which eliminates or reduces the toxicity or other undesirable properties of the alkylating compound with Structure I. The neutralizing agent may be present in a treatment solution or be part of a solid-phase agent, and preferably acts by eliminating the alkylating properties of the compound of Structure I.
Chiral Phosphoramide-Catalyzed Enantioselective Addition of Allylic Trichlorosilanes to Aldehydes. Preparative Studies with Bidentate Phosphorus-Based Amides
作者:Scott E. Denmark、Jiping Fu、Michael J. Lawler
DOI:10.1021/jo052203h
日期:2006.2.1
that more than one Lewis basic moiety (phosphoramide) is involved in the rate- and stereochemistry-determining step of enantioselectiveallylation, bidentate chiral phosphoramides were developed. Different chiral phosphoramide moieties were connected by tethers of methylene chains of varying length. The rate and enantioselectivity of allylation with allyltrichlorosilane promoted by the bidentate phosphoramides
Compounds of the formula I in which X, R
1
, R
2
, R
3
, R
4
and R
6
have the meanings indicated in Claim
1
, are inhibitors of cell proliferation/cell vitality and can be employed for the treatment of tumours.