Investigation of the Mitsunobu Reaction ofN-(2-Hydroxyethyl)-N′-Phenyl-Ureas
摘要:
The Mitsunobu reaction of N-(2-hydroxyethyl)-ureas 1 using PPh3 and EtO2CN=NCO2Et led to the mixture of N- and O-alkylation products or a single isomer depending on the substrates.
Amine-Catalyzed Phospha-Michael Reaction of α,β-Unsaturated Aldehydes and Ketones with Multifunctional <i>N</i>-Heterocyclic Phosphine-Thioureas as Phosphonylation Reagent
作者:Hai Huang、Jun Yong Kang
DOI:10.1021/acs.orglett.6b02121
日期:2016.9.2
amine-catalyzed phospha-Michael addition reaction of α,β-unsaturatedaldehydes/ketones with N-heterocyclic phosphines for the synthesis of γ-ketodiazaphosphonates has been developed. With freedom from nucleophile additives, this mild process affords a range of structurally diverse γ-ketodiazaphosphonates in moderate to excellent yields. Importantly, various α,β-unsaturated ketones were also tolerated in this
Rhodanine Derivatives, a Process for the Preparation Thereof and Pharmaceutical Composition Containing the Same
申请人:Ryu Seong Eon
公开号:US20090042872A1
公开(公告)日:2009-02-12
Disclosed herein are rhodanine derivatives, a method for the preparation thereof, and a pharmaceutical composition containing the same. The rhodanine derivatives have inhibitory activity against protein phosphatases (PPase) such as PTP1B, Prl-3, LAR, CD45, Cdc25A, Cdc25B, Cdc25C, Yop, PP1 and VHR, and can be applied for the prevention and treatment of PPase-caused diseases, including autoimmune diseases, diabetes, impaired glucose intolerance, insulin resistance, obesity, cancers, etc. when the inhibitory activity thereof is modulated.
A compound of formula (I):
or a tautomeric form thereof, or a pharmaceutically acceptable salt thereof, wherein:
R represents hydrogen or alkyl;
R1 represents an alkyl group or a substituted or unsubstituted aryl group;
R2 and R3 each represent hydrogen, or R2 and R3 together represent a bond;
A represents a benzene ring having in total up to five substituents;
X represents oxygen, sulphur or a moiety NR4 wherein R4 represents hydrogen or alkyl; and
n represents an integer in the range of from 2 to 6; a process for preparing such a compound, a composition containing such a compound and the use of the compound and composition in medicine.
式(I)化合物
或其同分异构形式,或其药学上可接受的盐,其中
R 代表氢或烷基
R1 代表烷基或取代或未取代的芳基;
R2 和 R3 各自代表氢,或 R2 和 R3 共同代表键;
A 代表一个苯环,其上总共有最多五个取代基;
X 代表氧、硫或分子 NR4,其中 R4 代表氢或烷基;以及
n 代表 2 至 6 之间的整数;制备这种化合物的工艺、含有这种化合物的组合物以及这种化合物和组合物在医药中的用途。
[[.omega.-(Heterocyclylamino)alkoxy]benzyl]-2,4-thiazolidinediones as potent antihyperglycemic agents
作者:Barrie C. C. Cantello、Michael A. Cawthorne、Graham P. Cottam、Peter T. Duff、David Haigh、Richard M. Hindley、Carolyn A. Lister、Stephen A. Smith、Peter L. Thurlby
DOI:10.1021/jm00049a017
日期:1994.11
A series of [(ureidoethoxy)benzyl]-2,4-thiazolidinediones and [[(heterocyclylamino)alkoxy]-benzyl]-2,4-thiazolidinediones was synthesized from the corresponding aldehydes. Compounds from the urea series, exemplified by 16, showed antihyperglycemic potency comparable with known agents of the type such as pioglitazone and troglitazone (CS-045). The benzoxazole 49, a cyclic analogue of 16, was a very potent enhancer of insulin sensitivity, and by modification of the aromatic heterocycle, an aminopyridine, 37, was identified as a lead compound from SAR studies. Evaluation of antihyperglycemic activity together with effects on blood hemoglobin content, to determine the therapeutic index, was performed in 8-day repeat administration studies in genetically obese C57 Bl/6 ob/ob mice. From these studies, BRL 49653 (37) has been selected, on the basis of antihyperglycemic potency combined with enhanced selectivity against reductions in blood hemoglobin content, for further evaluation.