Resolution of synthetically useful myo-inositol derivatives using the chiral auxiliary O-acetylmandelic acid
作者:Kana M. Sureshan、Yoko Kiyosawa、Fushe Han、Sayuri Hyodo、Yuhki Uno、Yutaka Watanabe
DOI:10.1016/j.tetasy.2004.11.030
日期:2005.1
Efficient methods for the resolution of various myo-inositol derivatives have been developed using O-acetylmandelic acid (OAM) as the chiralauxiliary. Various methods of introduction of the chiralauxiliary have been compared. DCC mediated coupling between the inositol derivative and O-acetylmandelic acid resulted in substantial racemization even at 0 °C; while acylation with O-acetylmandeloyl chloride
关于各种的分辨率有效的方法肌醇肌醇衍生物已被开发使用ø -acetylmandelic酸(OAM)作为手性助剂。比较了引入手性助剂的各种方法。DCC介导的肌醇衍生物与O-乙酰基扁桃酸之间的偶合即使在0°C时也导致大量消旋。而在吡啶存在下用O-乙酰基扁桃酰氯酰化则得到非对映异构体,而手性助剂没有外消旋化。使用OAM作为手性助剂的优势在于,可以通过分析1来确定拆分的非对映异构体的绝对构型各种质子的1 H NMR化学位移。非对映异构体的分离可以通过分步结晶或柱色谱法实现。肌醇衍生物的对映异构体可通过除去手性助剂获得。通过采用已知的选择性保护-去保护策略,可以合成旋光形式的各种衍生物。
Pharmaceutical compound and method
申请人:Bruno-Blanch Luis
公开号:US20070219164A1
公开(公告)日:2007-09-20
A new pharmaceutical compound for treating central nervous disorders, the compound comprising a therapeutically effective amount of valproic acid or pharmaceutically acceptable derivative thereof covalently bonded to myo-inositol. The invention also provides a composition, method for treating a patient and a method for obtaining the compound.
Enhanced relaxivity monomeric and multimeric compounds
申请人:——
公开号:US20040131551A1
公开(公告)日:2004-07-08
Metal chelates capable of exhibiting an immobilized relativity between about 60 and 200 mM
−1
s
−1
/metal atom are useful as magnetic resonance imaging agents. Additionally, a compound which is useful as a metal-chelating ligand has the following formula:
1
wherein
Q is a 4- to an 8-membered carbocyclic ring which may be fully or partially saturated;
t is an integer from 2 to 16;
each R group is independently hydrogen, —OH, —CH
2
-A, —OCH
2
CH(OH)CH
2
-A or a functional group capable of forming a conjugate with a biomolecule, provided that at least two of the R groups are selected from —CH
2
-A or —OCH
2
CH(OH)CH
2
-A; and
A is a moiety capable of chelating a metal atom.
Enzyme assisted synthesis of enantiomerically pure myo-inositol derivatives - chiral building blocks for inositol polyphosphates
作者:P. Andersch、M.P. Schneider
DOI:10.1016/s0957-4166(00)80058-0
日期:1993.10
Using a short and facile synthetic protocol involving highly selective, regio- and enantioselective enzymatic esterifications as key reaction steps, readily available myo -inositol is converted into optically pure 1D-1-O-butyryl-4,6-O-dibenzoyl-myo-inositol (-) - 5, a selectively protected central intermediate for the preparation of numerous inositol phosphates.
ENHANCED RELAXIVITY MONOMERIC AND MULTIMERIC COMPOUNDS