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已知:,如果要合成 ,所用的起始原料可以是( ) ①1,3戊二烯和2丁炔 ②2甲基1,3丁二烯和2丁炔 ③2,3二甲基1,3戊二烯和乙炔 ④2,3二甲基1,3丁二烯和丙炔.
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如果要合成所用的原始原料可以是
2 -甲基-l,3 -丁二烯和1 -丁炔
l,3 –戊二烯和2 -丁炔
2,3 -二甲基-1,3 -戊二烯和乙炔
2,3 -二甲基-l,3 -丁二烯和丙炔
抗炎药布洛芬的结构式是其合成路线很多但其共同的起始原料为
已知如果要合成所用的起始原料可以是
2,3-二甲基-1,3-戊二烯和丙炔
2,3-二甲基-1,3-戊二烯和乙炔
2-甲基-1,3-丁二烯和2-丁炔
1,3-戊二烯和2-丁炔
血红素合成的特点是
合成的主要部位是骨髓和肝脏
合成的原料是甘氨酸、铁离子、琥珀酰 CoA
合成的关键酶是 ALA合酶
合成的起始和终止过程均在线粒体中
合成的起始和终止过程均在细胞液中
有关转录和复制的叙述正确的是
与模板链的碱基配对均为α-T
合成的产物均需要加工
合成起始都需要引物
原料都是dNTP
都在细胞核内进行
Diels-Alder反应为共轭双烯与含有烯键或炔键的化合物相互作用生成六元环状化合物的反应最简单的
2-甲基-1,3-丁二烯和2-丁炔
2,3-二甲基-l,3-丁二烯和丙烯
2,3-二甲基-1,3-戊二烯和乙烯
1,3-戊二烯和2-丁烯
合成氢化可的松的原料有写4个等我国主要以为半合成的起始原料
己知|||+如果要合成所用的起始原料可以是①2甲基13丁二烯和2丁炔②13戊二烯和2丁炔
①④
②③
①③
②④
DNA后随链合成的起始要一段短的______它是由______以核糖核苷酸为底物合成的
已知如果要合成所用的原始原料可以是
2-甲基-l,3-丁二烯 和 2-丁炔
1,3-戊二烯 和 2-丁炔
2,3-二甲基-1,3-戊二烯 和 乙炔
2,3-二甲基-l,3-丁二烯 和 丙炔
简述氯霉素的以乙苯为起始原料经对硝基苯乙酮合成路线的优缺点
在聚氨酯合成工艺中根据所用原料官能团数目的不同可以制成或的高分子聚合物
已知反应如果要合成化合物
,其结构为:
,下列说法不正确的是 A.合成A.的原料可能是:2-甲基-l, 3-丁二烯和2-丁炔
合成A.的原料可能是:2, 3-二甲基-l, 3-丁二烯和丙炔
该反应的原理是加成反应
化合物A.和HBr 1:1加成时,有三种不同的产物。
合成二甲基硅油的起始原料是
以天然气为原料小型合成氨装置原料天然气加热至加氢反应温度所用换热器是E-
1
1A
1、1A
1B
已知|||+如果要合成所用原料可以是①2—甲基—13—丁二烯和2—丁炔②13—戊二烯和2—丁炔③23
①④
②③
①③
②④ 足量氢气
已知如果要合成所用的起始原料可以是
2﹣甲基﹣1,3﹣丁二烯和1﹣丁炔
1,3﹣戊二烯和2﹣丁炔
2,3﹣二甲基﹣1,3﹣戊二烯和乙炔
2,3﹣二甲基﹣1,3﹣丁二烯和丙炔
有关血红素合成特点的叙述错误的是
合成主要部位是骨髓和肝脏
合成原料是甘氨酸、琥珀酰CoA及Fe2+
合成的起始和最终过程均在线粒体中
ALA脱水酶是血红素合成的限速酶
合成中间步骤在胞液
醇酸树脂的合成工艺按所用原料的不同可分为
聚酰胺合成工艺主要有哪两类并请说出聚酰胺6合成所用的原料
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