【摘 要】
：
A practical six-step synthesis of 12 methylated and hydroxylated isoflavanones was accomplished starting from readily available m-xylene.A significant improveme
【出 处】
：
Chinese Chemical Letters
论文部分内容阅读
A practical six-step synthesis of 12 methylated and hydroxylated isoflavanones was accomplished starting from readily available m-xylene.A significant improvement of this procedure included application of the simple and commercially available reagents,avoidance of expensive reagents and catalysts,simple operations and excellent yields.
A practical six-step synthesis of 12 methylated and hydroxylated isoflavanones was accomplished starting from readily available m-xylene. A significant improvement of this procedure included application of the simple and commercially available reagents, avoidance of expensive reagents and catalysts, simple operations and excellent yields .
其他文献
Ｍａｒｆａｎ氏综合征一家系李书清王舸张玉莲李红珏（河北省人民医院眼科，石家庄０５００５１）患者侯××，女，１１岁。于１９９５年８月６日由心脏外科门诊转入我科会诊。其父述患者自幼视物不清，身长体瘦，心慌气短。家族史：其
2011年,广西石油和化学工业(简称“石化行业”)经济运行总体保持了较快增长态势,石化产业千亿元目标提前3个月实现,全年完成工业总产值1360.2亿元,比上年增长91.6%,工业增加
Ⅱ型糖尿病合并非典型冠心病３２例报告广州市第二人民医院内科（５１０１５０）唐彬吴沃栋麦卫阳冠心病是糖尿病常见并发症之一，在Ⅱ型糖尿病者中发病率高于普通人群２～３倍。其起病隐袭，症状不典型［１］，除了
怡那林治疗糖尿病肾病疗效观察姜锡光王瑛王永珍（吉林省人民医院老年病科１３００２１）董振国彭琦（吉林省人民医院药房１３００２１）糖尿病肾病（ＤＮ）是糖尿病（ＤＭ）致死致残的重要原因之一，一旦发现，在临床上治疗是很棘
该产品用于洗手间。其特点 :一是节省使用面积。使用该产品在洗手间内将看不到以往的水箱和坐便器 ,腾出的位置至少 1m2。如使用该产品的楼有 5 0套住房 ,那么该楼就节省 5 0
患者林××，女，25岁。由于经常头部、鳞屑增多、头部皮肤瘙痒，在我院门诊部皮肤科就诊，初诊断为头皮脂溢性皮炎，使用西安杨森制药有限公司出品的2％采乐洗剂（酮康叹洗剂）治疗。第1次取
湖北省黄石市消除碘缺乏病达标试点与效果评估龚新国熊培生张岚杨芳黄秀英郑朝晖尹坚为贯彻落实《中国２０００年消除碘缺乏病规划纲要》和《湖北省２０００年消除碘缺乏病规划纲要》，了解现阶
中国石化集团近日称,由齐鲁石化研究院与塑料厂联合自主开发的新型塑料材料——耐热聚乙烯,经第三方检测鉴定机构国家化学建筑材料测试中心8 760个小时的等级认证,经严格检验
Hydrothermal reactions of oxalic acid(H2ox) and 2-sulfobenzoic acid(H2L) with lanthanide oxide or hydroxide yielded five lanthanide oxalatosulfocarboxylates.The
Solid adsorbents Cu+-13X and Cu+-13X loaded with La element were prepared by ion-exchange method. X-ray diffraction (XRD) and scanning electron microscope (SEM)