stereospecific synthesis of O-methyl-chiro-inositols and O-methyl-scyllo-inositol was achieved, starting from p-benzoquinone. After preparing dimethoxy conduritol-B as a key compound, regiospecific bromination of the alkene moiety of dimethoxy conduritol-B and acid-catalyzed ring opening of dimethoxydiacetate conduritol-B epoxide with Ac2 O afforded the desired new chiro-inositol derivatives and scyllo-inositol
从对苯醌开始,实现了 O-甲基-手性肌醇和 O-甲基-鲨肌醇的区域和立体定向合成。在制备二甲氧基硬糖醇-B作为关键化合物后,二甲氧基硬糖醇-B的烯烃部分的区域特异性溴化和二甲氧基二乙酸硬糖醇-B环氧化物与Ac2O的酸催化开环得到所需的新手性肌醇衍生物和鲨肌醇衍生物, 分别。光谱方法用于表征所有合成的化合物。新型肌醇 (11-17) 对人碳酸酐酶同工酶 I 和 II(hCA I 和 II)以及乙酰胆碱酯酶 (AChE) 具有有效的抑制特性。发现新型肌醇 11-17 是针对 AChE、hCA I 和 hCA II 酶的有效抑制剂。Ki 值的计算范围为 87。hCA I 为 59 ± 7.011 至 237.95 ± 17.75 μM,hCA II 为 65.08 ± 12.39 至 538.98 ± 61.26 μM,A.7Ch 分别为 193.28 ± 43.13 至 765.08 ± 209
Synthesis of scyllo-inositol derivatives and their effects on amyloid beta peptide aggregation
作者:Yedi Sun、Guohua Zhang、Cheryl A. Hawkes、James E. Shaw、JoAnne McLaurin、Mark Nitz
DOI:10.1016/j.bmc.2008.06.045
日期:2008.8
scyllo-inositol derivatives have been synthesized which contain deoxy, fluoro, chloro, and methoxy substitutions. The effects of these compounds on the aggregation cascade of Abeta42 have been investigated using electron microscopy (EM). EM analyses revealed that the 1-deoxy-1-fluoro- and 1,4-dimethyl-scyllo-inositols significantly inhibit the formation of Abeta42 fibers. The other derivatives showed some alterations