[EN] NEW LIGANDS FOR TARGETING OF S1P RECEPTORS FOR IN VIVO IMAGING AND TREATMENT OF DISEASES [FR] NOUVEAUX LIGANDS POUR LE CIBLAGE DE RÉCEPTEURS DE S1P, UTILISÉS DANS L'IMAGERIE IN VIVO ET LE TRAITEMENT DE MALADIES
The Syntheses of Cyclic Spermine Alkaloids: Analogues of Buchnerine and Budmunchiamine C
作者:Yi Li、Manfred Hesse
DOI:10.1002/hlca.200390033
日期:2003.2
The syntheses of two macrocyclic sperminealkaloids, analogues 1 and 2 of budmunchiamineC and buchnerine, in which N,N′-bis(2-aminoethyl)hexane-1,6-diamine (PA 262; 4) replaces spermine as polyamine backbone, were accomplished by two different methods. The first synthetic approach was based on a metal-template intramolecular amidation of tetraamino esters prepared from a Michael addition of protected
合成两个大环精胺生物碱,布孟奇胺C和布氏碱的类似物1和2,其中N,N'-双(2-氨基乙基)己烷-1,6-二胺(PA 262; 4)取代精胺作为多胺骨架,是通过两种不同的方法完成的。第一种合成方法是基于金属模板分子内酰胺化四氨基酯,该四氨基酯由分别将受保护的PA 262 10迈克尔加成至十六烷基-2-壬酸乙酯(12)和丙-2-炔酸乙酯17制备而成(参见方案4)。和5,分别)。连续迈克尔在第二种合成方法中,将乙烷-1,2-二胺添加到不饱和酯中并进行氨解以制备前体23和24(方案6)。然后通过在DMF中以Cs 2 CO 3为催化剂的磺酰胺基衍生物25和26的大环化来构建大环内酰胺。
Domino Primary Alcohol Oxidation-Wittig Reaction: Total Synthesis of ABT-418 and (<i>E</i>)-4-Oxonon-2-enoic Acid
作者:Santosh Tilve、Jyoti Shet、Vidya Desai
DOI:10.1055/s-2004-829123
日期:——
Domino oxidation of primary alcohols to α,β-unsaturatedcompounds using the combination of PCC-NaOAc and stabilized Wittig reagent and its application towards total synthesis of ABT-418 and 4-oxonon-2-enoic acid is described.
The syntheses of four macrocyclic sperminealkaloids, (±)-budmunchiamine A – C (1a – c) and (±)-budmunchiamine L4 (1), were accomplished by Michael addition of spermine to the α,β-unsaturated esters 3a – d, followed by cyclization of the resulting α,ω-tetraamino esters 4a – d with triethoxyantimony; N-methylation of the amino lactams 6a – c yielded the budmunchiamines A – C (1a – c).
四种大环精胺生物碱 (±)-budmunchiamine A – C (1a – c) 和 (±)-budmunchiamine L4 (1) 的合成是通过 Michael 将精胺添加到 α,β-不饱和酯 3a – d 中完成的,然后用三乙氧基锑环化所得的 α,ω-四氨基酯 4a-d;氨基内酰胺 6a – c 的 N-甲基化产生 budmunchiamines A – C (1a – c)。
NOVEL SYNTHESIS INTERMEDIATES FOR OBTAINING DERIVATIVES OF SPHINGOSINES, CERAMIDES AND SPHINGOMYELINS WITH GOOD YIELDS
申请人:M2I DEVELOPMENT
公开号:US20160083335A1
公开(公告)日:2016-03-24
The subject matter of the present invention is the novel molecules of formulae E, E′ and F. These molecules prove to be synthesis intermediates that are very advantageous for the manufacture of derivatives of sphingosine or of ceramides functionalized in position 1, with good yields, in which R
1
and R
2
are fatty chains, R
3
is an alkyl group and R
4
is a protective group for alcohol functions. Another subject of the invention is the use of the intermediates of type F for converting same into intermediates of type G, by means of reduction in the presence of lithium borohydride. The G molecules are precursors that are known to make it possible to obtain sphingolipids or sphingomyelin.
Deuterium- and tritium-labeled d-erythro-sphingosine (1b and 1c) were prepared by an efficient approach based on a known stereoselective total synthesis. Tritium was introduced at C−1 by [3H]NaBH4 reduction in the final synthetic step to give 1c of high radiochemical purity. 1,1,3-Trideuterio-d-erythro-sphingosine (1b) was prepared similarly and showed >99·5% enantiomeric purity and a high level of