Synthesis of 1′-aza-C-nucleosides from (3R,4R)-4-(hydroxymethyl)pyrrolidin-3-ol
摘要:
Pyrimidine 1'-aza-C-nucleosides are synthesised by the fusion of 5-bromouracil, 5-bromocytosine and 5-bromoisocytosine with (3R,4R)-4-(hydroxymethyl)pyrrolidin-3-ol in 40-41% yield. A homologue of 1'-aza-Psi -uridine is obtained in a Mannich reaction in 65% yield by treatment of the azasugar, paraformaldehyde and uracil. N-Alkylation of (3R,4R)-4-(hydroxymethyl)pyrrolidin-3-ol with 6-chloromethyluracil gives the 6-regioisomeric homologue. (3R,4R)-4-(Hydroxymethyl)pyrrolidin-3-ol is synthesised in 25% overall yield from diacetone-D-glucose via 3-C-(azidomethyl)-3-deoxy-D-allose which is subjected to an intramolecular reductive amino alkylation reaction to give (3R,4S)-4-[(1S,2R)-1,2,3-trihydroxypropyl]pyrrolidin-3-ol followed by Fmoc protection, oxidative cleavage of the triol group with further reduction of the obtained aldehyde and subsequent deprotection of the nitrogen atom. (C) 2001 Elsevier Science Ltd. All rights reserved.
Syntheses and bio-activities of the l-enantiomers of two potent transition state analogue inhibitors of purine nucleoside phosphorylases
作者:Keith Clinch、Gary B. Evans、George W. J. Fleet、Richard H. Furneaux、Stephen W. Johnson、Dirk H. Lenz、Simon P. H. Mee、Peter R. Rands、Vern L. Schramm、Erika A. Taylor Ringia、Peter C. Tyler
DOI:10.1039/b517883e
日期:——
enantiomers of some pharmaceuticals have revealed surprising biological activities, the L-nucleoside analogues (+)-5 x HCl and (-)-6, respectively, of D-ImmH and D-DADMe-ImmH, were prepared and their PNPase binding properties were studied. For the synthesis of compound (-)-6 suitable enzyme-based routes to the enantiomerically pure starting material (3S,4S)-4-(hydroxymethyl)pyrrolidin-3-ol [(-)-6] and its
(1R)-1-(9-脱氮杂黄嘌呤-9-基)-1,4-二脱氧-1,4-亚氨基-L-核糖醇[(+)-5]和(3S,4S)-1-[[9 -脱氮杂黄嘌呤-9-基)甲基] -4-(羟甲基)吡咯烷-3-醇[(-)-6]是Immucillin-H(D-ImmH)和DADMe-immucillin-H(D-这些D-异构体分别是嘌呤核苷磷酸化酶(PNPases)的高亲和力过渡态类似物抑制剂,被开发为针对涉及T细胞异常活化的疾病的潜在药物。盐酸C-核苷D-ImmH [(-)-5)x HCl,现在作为抗T细胞白血病剂正在“ Fodosine”处于II期临床试验,而D-DADMe-ImmH是第二代抑制剂与目标酶具有极强的结合力,并已作为抗银屑病药物进入临床第一阶段测试。由于某些药物的对映异构体显示出令人惊讶的生物学活性,因此分别制备了D-ImmH和D-DADMe-ImmH的L-核苷类似物(+)-5 x HCl和(
Synthesis of an aza analogue of 2-deoxy-d-ribofuranose and its homologues
作者:Vyacheslav V Filichev、Malene Brandt、Erik B Pedersen
DOI:10.1016/s0008-6215(01)00132-x
日期:2001.7
Azasugars were obtained in one-pot reactions by catalytic reduction reactions of amino group precursors in aldosugars followed by intramolecular reductive amino alkylation reactions. (3R,4S)-4-[(1S)-1,2-Dihydroxyethyl]pyrrolidin-3-ol was obtained from D-xylose by two different strategies through 3-C-cyano-3-deoxy-D-ribo-pentofuranose or 3-C-azidomethyl-3-deoxy-D-ribo-pentofuranose in 6 and 16% overall
OBJECT To provide novel quinolonecarboxylic acid compounds serving as safe, strong antibacterial agents that are effective against drug-resistant bacteria that are less susceptible to conventional antibacterial agents. SOLVING MEANS
There are provided 7-(4-substituted-3-cyclopropylaminomethylpyrrolidinyl)quinolonecarboxylic acid derivatives (such as 1-cyclopropyl-7-[(3S,4S)-3-cyclopropylaminomethyl-4-fluoro-1-pyrrolidinyl]-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid) that exhibit strong antibacterial activity against gram-positive bacteria, such as MRSA, PRSP and VRE, while being safe. The compounds are shown by the following general formula (I):
Object
To provide novel quinolinecarboxylic acid compounds serving as safe, strong antibacterial agents that are effective against drug-resistant bacteria that are less susceptible to conventional antibacterial agents.
Solving Means
There are provided 7-(4-substituted-3-cyclopropylaminomethylpyrrolidinyl)quinolonecarboxylic acid derivatives (such as 1-cyclopropyl-7-[(3S,4S)-3-cyclopropylaminomethyl-4-fluoro-1-pyrrolidinyl]-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid) that exhibit strong antibacterial activity against gram-positive bacteria, such as MRSA, PRSP and VRE, while being safe. The compounds are shown by the following general formula (I):
7- (4-substituted-3-cyclopropylaminomethyl-1-pyrrolidinyl) quinolonecarboxylic acid derivative technical field
申请人:Asahina Yoshikazu
公开号:US20090176824A1
公开(公告)日:2009-07-09
Object To provide novel quinolonecarboxylic acid compounds serving as safe, strong antibacterial agents that are effective against drug-resistant bacteria that are less susceptible to conventional antibacterial agents.
Solving Means There are provided 7-(4-substituted-3-cyclopropylaminomethylpyrrolidinyl)quinolonecarboxylic acid derivatives (such as 1-cyclopropyl-7-[(3S,4S)-3-cyclopropylaminomethyl-4-fluoro-1-pyrrolidinyl]-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid) that exhibit strong antibacterial activity against gram-positive bacteria, such as MRSA, PRSP and VRE, while being safe. The compounds are shown by the following general formula (I):