Charlestown(Corn.)

Synthesis and characterization of Schiff bases derived from chalcone and thiosemicarbazide;

查尔酮缩氨基硫脲类希夫碱的合成与表征

First Total Synthesis of 2′,4-Dihydroxy-4′,6′-dimethoxydihydrochalcone;

2′,4-二羟基-4′,6′-二甲氧基-二氢查尔酮的首次全合成

A facial synthesis of ferrocenylchalcones under microwave irradiation;

二茂铁基查尔酮衍生物的微波合成

The Michael reaction of chalcones as acceptors with several active methylene compounds such as diethyl malonate, nitromethane,ethyl acetoacetate and cyclohexone et al as donors catalyzed by KF/basic Al_2O_3 under ultrasound irradiation proceed very efficiently and furnish higher yield of adducts.

超声辐射下 ,对查尔酮与含活泼亚甲基的化合物诸如丙二酸二乙酯、硝基甲烷、乙酰乙酸乙酯、环己酮等 ,在KF/basicAl2 O3催化下的Michael反应进行了研究 ,该法具有反应时间短、产率高、操作简单、催化剂可以重复使用的优点 。

Chapter 2: Michael addition of chalcones with various of active methylene compounds such as diethyl malonate, phenylacetonitrile, malononitrile, ethyl acetoacetate, cyclohexanone catalyzed by KF/basic Al_2O_3 results Michael adducts in 20%-98% yields under grinding in 20-90 min at room temperature.

第二章:本章主要研究了研磨条件下碱性氧化铝固载氟化钾催化的查尔酮与活泼亚甲基化合物,如:丙二酸二乙酯、苯乙腈、丙二腈、乙酰乙酸乙酯、环己酮等的迈克尔反应,反应在20-90分钟内完成,得到收率为20%-98%的迈克尔加成产物。

Inspiration of management of the Charles River watershed in the U.S.A to watershed management in China;

美国查尔斯河流域管理对我国流域管理的借鉴

The Present Situation of the Spoken and Written Language of the Sibo Nationality in the Sibo Autonomous County in Chabuchar in Xinjiang;

新疆察布查尔锡伯自治县锡伯族语言文字使用现状