Stable analogues of ribose-1-phosphate and methods for treating diabetes and other metabolic disorders
申请人:Linn Saul Gregory
公开号:US20070099851A1
公开(公告)日:2007-05-03
Novel D-ribose-1-phosphate analogue compounds of formula I, pharmaceutically acceptable prodrugs and salts thereof, and their use as hypoglycemic agents and anticancer agents and regulators of carbohydrate metabolism are useful for the treatment of diabetes in humans and for the treatment of various metabolic disorders that involve the regulation of cellular metabolism, e.g. cancer
O-(1-Phenyl-1H-tetrazol-5-yl) Glycosides: Alternative synthesis and transformation into glycosyl fluorides
作者:Monica Palme、Andrea Vasella
DOI:10.1002/hlca.19950780418
日期:1995.6.28
A number of new glycosyl donors, O-(1-phenyl-1H-tetrazol-5-yl) glycosides, are prepared from the corresponding hemiacetals, commercially available 5-chloro-1-phenyl-1H-tetrazole (2), and tetrabutylammonium fluoride (Bu4NF) in either THF or DMF. The mild reaction conditions are compatible with a variety of protecting groups. The glycosyl donors are treated with hydrogen fluoride-pyridine complex (HF·py)
由相应的半缩醛,可商购的5-氯-1-苯基-1 H-四唑(2)制备许多新的糖基供体O-(1-苯基-1 H-四唑-5-基)糖苷(2),THF或DMF中的四丁基氟化铵(Bu 4 NF)。温和的反应条件可与多种保护基团相容。糖基供体用氟化氢-吡啶配合物(HF·py)处理,以良好或优异的产率快速提供糖基氟化物,显然是通过(单或双)S N 2机理进行的,正如1 H和19所研究的那样F-NMR光谱。在酸性条件下,糖基氟化物部分或完全平衡,需要大量过量的HF·py进行平衡。
Wittig approach to carbohydrate-derived vinyl sulfides, new substrates for regiocontrolled ring-closure reactions
Reaction of methyl- and phenylthiomethylidene phosphoranes 1 and 2 with a variety of reducing sugars has been explored. Furano-type carbohydrates afforded with good yields the corresponding open-chain vinyl sulfides, whereas pyrano derivatives produced elimination compounds together with the expected vinyl sulfides, depending on the nature of the protective groups.