萨莫瓜碱A是否确实是苯并[ f ]酞嗪-4(3 H)-1 ?苯并[ f ]酞嗪-4(3 H)-one及其区域异构体苯并[ f ]酞菁-1(2 H)-one的明确,直接合成
摘要:
为了阐明从天然番荔枝种子中分离出来的天然产物萨莫夸宁A的结构,已合成了两种苯并[ f ]酞嗪酮异构体。建立这些骨架所遵循的合成途径是基于在哒嗪酮前体上的两个Suzuki反应和通过缩合反应的闭环反应的结合。如前所述,合成化合物的1 H NMR数据确定天然产物samoquasine A的结构不是苯并[ f ]酞嗪-4(3 H)-one。
NITROGEN-CONTAINING HETEROCYCLIC COMPOUND OR SALT THEREOF
申请人:FUJIFILM Corporation
公开号:US20150322063A1
公开(公告)日:2015-11-12
A compound represented by Formula [1] (in the formula, Z
1
represents N, CH, or the like; X
1
represents NH or the like; R
1
represents a heteroaryl group or the like; each of R
2
, R
3
, and R
4
represents a hydrogen atom, a halogen atom, an alkoxy group, or the like; and R
5
represents a heteroaryl group or the like) or salt thereof.
[EN] DERIVATIVES OF 2H PYRIDAZIN- 3 -ONES, THEIR PREPARATION AND THEIR USE AS SCD-1 INHIBITORS<br/>[FR] DÉRIVÉS DE 2H-PYRIDAZIN-3-ONES, LEUR PRÉPARATION ET LEUR UTILISATION COMME INHIBITEURS DE LA SCD-1
申请人:PF MEDICAMENT
公开号:WO2011015629A1
公开(公告)日:2011-02-10
The present invention concerns compounds of general formula (I) characterized in that (formula 1) wherein, in particular: -R1 represents one or more groups such as: trif luoromethyl, halogen such as F, C1, -when n=m=1, W represents CH then Y represents oxygen, -U represents: • either - (C=O) CH2NH- and is branched at position 4 of pyridazinone, then R2 represents H, • or -(C=O)NH- and U is branched at positions (4), (5) or (6) of pyridazinone, then R2 represents H, - R3 represents a hydrogen or methyl and the addition salts with pharmaceutically acceptable bases and acids and the different isomers, and their mixtures in any proportion for use as SCD-1 enyzme inhibitors for the treatment of obesitz, tzpe-2 diabetes and lipid disorders.
Synthesis and NMR studies of some imidazo[4,5-<i>d</i>]pyridazine nucleosides
作者:R. Paul Gagnier、Michael J. Halat、Brian A. Otter
DOI:10.1002/jhet.5570210243
日期:1984.3
Unlike imidazo[4,5-d]pyridazin-4(5H)-one (1a), which undergoes ribosylation at N-6 in the Vorbruggen procedure for nucleoside synthesis, the 5-benzyloxymethyl derivative 12 undergoes ribosylation at N-1 and N-3 to give a separable mixture of 14 and 15. Removal of the N-5 blocking groups from 14 and 15 by treatment with boron trichloride at −78° affords the intermediates 16 and 17, which were debenzoylated
与咪唑并[4,5- d ]哒嗪-4(5 H)-one(1a)在核苷合成的Vorbruggen程序中在N-6处进行核糖基化不同,5-苄氧甲基衍生物12在N-1处进行核糖基化。 N-3给出14和15的可分离混合物。通过在-78°下用三氯化硼处理将N-5封闭基团从14和15除去,得到中间体16和17,将它们进行脱苯甲酰化,得到4-氧代核苷5和6。16和17的Thion,然后进行S-甲基化和氨解反应,生成4-氨基核苷2和3。这些核苷的糖基化位点通过结合使用1 H和13 C nmr数据进行分配,尤其是测量基本质子的自旋晶格弛豫时间(T 1)。使用这些技术,表明先前报道为3的核苷实际上是N-6异构体。
PURINE NUCLEOSIDE ANALOGUES FOR TREATING FLAVIVIRIDAE INCLUDING HEPATITIS C
申请人:Indenix Pharmaceuticals, Inc.
公开号:US20140234251A1
公开(公告)日:2014-08-21
This invention is directed to a method for treating a host, especially a human, infected with hepatitis C, flavivirus and/or pestivirus, comprising administering to that host an effective amount of an anti-HCV biologically active pentofuranonucleoside where the pentofuranonucleoside base is an optionally substituted 2-azapurine. The optionally substituted pentofuranonucleoside, or a salt or prodrug thereof, may be administered alone or in combination with one or more optionally substituted pentofuranonucleosides or other anti-viral agents.
A compound comprising the formula (I), wherein each X1is independently selected from C, N, O and S; each Y is independently selected from C and N; Z1is independently selected from C and N; each X1 may independently be unsubstituted, or may independently be substituted with H or a substituted or unsubstituted organic group; each Y may independently be unsubstituted, or may independently be substituted with H or a substituted or unsubstituted organic group; m may be 1, 2, 3 or 4; n may be 1, 2, or 3; the bonds between all of the atoms in ring A may independently be single bonds or double bonds; the bonds between all of the atoms in ring B may independently be single bonds or double bonds; and wherein R1may be attached to Z1by a single bond or a double bond.