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1)  20S-diol diacetate
20S-二醇二乙酸酯
1.
The efficient synthesis of pregn-16-ene-3S,20S-diol diacetate and the restudy of its Pd-catalyzed reaction
孕甾-16-烯-3S,20S-二醇二乙酸酯的高效合成及其钯催化反应的再研究
2.
The reaction of 16R-bromopregnane-3S,20S-diol diacetate with bases was investigated according to the demand of rationally utilizing steroidal sapogenins.
为了合理利用甾体皂甙元资源,系统地考察了16R-溴代孕甾-3S,20S-二醇二乙酸酯在不同反应条件下与碱的反应。
3.
16R-bromopregnane-3S, 20S-diol diacetate can been easily prepared in a large scale by the transformation of tigogenin obtained from the industrial waste.
<正>16R-溴代孕甾-3S,20S-二醇二乙酸酯可以方便地、大量地从我国制麻工业副产物剑麻皂甙元进行制备,如何利用其合成甾体药物和具有生物活性的天然甾体化合物对于合理利用剑麻皂甙元资
2)  20S-diol
20S-二醇
1.
The synthetic key step involved a new fragmentation reaction of 16R-bromopregnane-3S, 20S-diol recently found by us.
本文利用我们最近发现的16R-溴代孕甾-3S,20S-二醇的碎裂反应,从剑麻皂甙元降解产物—孕甾三醇出发
3)  ethylene glycol diacetate
乙二醇二乙酸酯
1.
The present status and prospects of environmental friendly catalysts research in catalytics synthesis of ethylene glycol diacetate are reviewed in the paper.
评述了环境友好催化剂催化合成乙二醇二乙酸酯的研究现状及发展前景,指出多数环境友好催化剂易与产物分离,减轻了对设备的腐蚀与环境污染,催化剂能够不同程度地重复使用,但有些催化剂制备工艺步骤多,成本偏高,寿命较短,还须进一步加强研究。
4)  glycol diacetate
乙二醇二乙酸酯
1.
The results showed that ZnCl2/C had high catalytic activity for synthesizing glycol diacetate.
以ZnCl2/C为催化剂,乙二醇与乙酸进行酯化反应,合成了乙二醇二乙酸酯。
2.
The vapor liquid equilibrium data for the two binary systems,vinyl acetate acetic ether and acetic acid glycol diacetate,at 101.
3kPa下乙酸乙烯-乙酸乙酯及乙酸-乙二醇二乙酸酯二元体系汽液平衡数据,并用Wilson和NRTL方程进行了关联,取得较为满意的结果,并已用于有关精馏塔的计算。
5)  ethylene glycol diacetate
二乙酸乙二醇酯
1.
The preparation method of ethylene glycol diacetate catalyzed by phase transfer catalyst, p-toluene sulfonic acid, strongly acidic cationic exchange resin, ferric chloride hexahydrated, ammonium ferric sulfate dodecahydrated, ferric sulfate, sodium bisulfate monohydrate and supporting ferric molecular sieve et.
论述了利用相转移催化剂、对甲苯磺酸、强酸性阳离子交换树脂、六水三氯化铁、十二水合硫酸铁铵、硫酸铁、一水硫酸氢钠和载铁分子筛等催化剂制备二乙酸乙二醇酯的方法。
6)  ethylene glycol dipropionate
乙二醇二丙酸酯
补充资料:孕烷-3,20-二醇
分子式:
CAS号:

性质:无色板状结晶。熔点-244℃。+27.4°。为一种甾类化合物,存在于孕妇尿中,为黄体酮的代谢产物。由石胆酸制得的孕烷3α醇-20-酮或由皂角苷配基制得的△16-孕烷-3α-醇-20-酮经钠和醇进行还原制取之。用于女子更年期障碍,月经障碍、粉刺。5α-孕甾烷3β,20β-二醇  5α-pregnane-3β,20β-diol  熔点194.5~195.5℃。旋光度+4.4°(c=1.04,氯仿)。从怀孕的母马尿中分离而得。雌激素。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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