Compound 1(45 mg, 0.18 mmol) wasdissolved in 5% K2CO3 in MeOH/H2O (15 mL), and the soln. was stirred at 23°C for 4 h. H2O (3 mL) wasadded, the soln. was saturated with NaCl, and then extracted with CH2Cl2(5×15 mL). The combined org. extrac...
例如:name the compound below CH3CH2CH=CHCH3 最长的C链上有5个碳原子,所以应该用“pent”表示主链上碳原子个数,因为这个分子当中出现了碳碳双键,所以它应该属于alkene,后缀应该用“-ene”,根据数字(第几号碳)最小原则,双键连接在2号碳上,官能团后缀的前面要加...
The Wittig reaction is a reaction between a carbonyl compound (aldehyde or ketone only) and a species known as a phosphonium ylid.三. 硫叶立德举例如下:Corey–Chaykovsky reaction是一个用来合成如环氧化合物、氮杂环丙烷和环丙烷这类含三元环结构的有机化合物的有机化学反应...
1854年,Bechamp首先报道了利用铁粉还原芳香硝基化合物合成芳香伯胺反应,此反应被称为Bechamp还原反应。制备芳胺一般而言,最干净和简便的还原方法就是通过Pd/C或Raney Ni加氢,但是当分子内存在对加氢敏感的官能团,如:卤素(Cl, Br and I; F 对加氢不...
70:复对位(compound counterpoint ) 凡对位音乐的各声部可以高低易位者,统称为复对位。复对位按声部数量可分为二重对位、 三重对位、四重对位等。 71:音域(compass ) 人声或乐器发声的音调广度,常以其高低两极音表示之。各种音域,其各局部的音质不相同,...
Compound Sentence并列句 1.Recycling can protect the environment,andit can save money, too.回收再利用能保护环境而且能节约资金。 2.people produce power from coal,butit is very dirty and causes acid rain.人们用煤来生产动力,但是这种方法很脏并且会导致...
compound interval 复音程 compound meter(s) 复拍子 compound triple meter(s) 复三拍子(9/4,9/8) concert master 首席 concerto 协奏曲 concerto, concierto 协奏曲 Concrete Music 具体音乐 Accidentalism 偶然主义 conductor 指挥 consonant 协和(音程、和弦...
2.构词法是讲compound word 物理 01 初中物理 1.学习使用电磁继电器、2. 热机效率、3. 凸透镜成像规律、4. 电荷间相互作用的规律、5. 测量小灯泡的电压、6. 有用功和额外功、7.热机、8. 并联电路的电压、9. 光沿直线传播、10. 密度 02 高中物理 ...
GMP:Good ManufacturingPractice 2、国家食品与药品监督管理局 State Food andDrug Administration 3、总则 GeneralProvisions 4、《中华人民共和国药品管理法》 the DrugAdministration Law of the People s Republic of China 5、制剂 Prepa...
was heated at 115-120oCfor 7 hr. After the reaction was complete, the mixture was kept at r.t.overnight. Then acetone (2 mL) was added to and precipitate was formed. Thecrude product was filtratrated after cooling, washed with pentane and dried togive 0.43 g targ...