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- A cloud is a condensation of water vapour. 云是由水蒸汽凝缩而成的。
- His shaving mirror was covered with condensation. 他的剃须镜上有一层小水珠。
- cyclization condensation 环化缩合
- A brief summary; a condensation. 概要简洁的概括; 总结
- Cyclization occurs readily with dilute alkali. 遇到稀碱就容易环化。
- METHODS Gimeracil was synthesized by steps of condensation, cyclization, chlorination and hydrolysis. 方法以丙二腈为起始原料，经缩合、环合、氯化、水解等5步反应制得吉美拉西。
- A condensation to quinoid systems occurs. 发生了醌型体系的缩合反应。
- Methods Starting with 3-fluorophenyl isocyanate and(R)-epichlorohydrin, linezolid was synthesized through cyclization, substitution, acylation, bromination, and condensation. 方法以(R)-环氧氯丙烷和间氟苯基异氰酸酯为起始原料，经环化、叠氮化、还原、酰化、溴代、缩合反应得到利奈唑酮。
- Ionone was synthesized from Litsea cubeba oil and lemen oil,and condition of condensation,cyclization and purification of product was studied. 以山苍子油、柠檬草油为原料合成紫罗兰酮,研究了缩合反应、环化反应、产品精制的工艺条件;
- Methods: Starting from diethanolamine, BP897 was prepared via chlorination, cyclization, substitution, aminolysis and condensation reaction. 方法:以二羟乙基胺为起始原料,经过氯化、环合、取代、肼解、缩合等反应合成BP897。
- Zaleplon,a new sedative hypnotic drug was synthesized from acetophenone by nitration,reduction,acylation,condensation,hydrocarbylation,and cyclization. 以苯乙酮为原料,经硝化、还原、酰化、缩合、烃化、环合反应合成了新型镇静催眠药扎来普隆,总收率为221%25。
- METHOD:With the 2 aminobenzoic acid as the starting material,Tacring was synthesized via condensation cyclization,chlorization and amination. 方法:以邻氨基苯甲酸为原料,经缩合、氯化、氨化反应,制得他克林。
- There was condensation on the windows. 玻璃窗上凝结着水珠。
- And then some coumarin fluorescent brighteners containing zole or triazine group were prepared from the intermediate by condensation,cyclization. 苯基-7-氨基香豆素是合成3,7-取代香豆素类型荧光增白剂的重要中间体。
- There was condensation on the glass. 玻璃杯上凝结着水珠。
- By this means, rapid condensation takes place. 用这种方法，冷凝很快。
- METHODS Pemetrexed was synthesized starting from p-iodobenzoic acid via ten steps,including chlorination,esterification,condensation,cyclization,hydrolysis and saponification. 方法以对碘苯甲酸为起始原料,经氯化、酯化、缩合、环合、水解、成盐等十步反应合成培美曲塞。
- Tinoridine hydrochloride was synthesized from benzylamine by condensation, cyclization, decarboxylation, cyclization and then salt formation in an overall yield of 55.2%. 以苄胺为起始原料,经缩合、成环、脱羧、环合、成盐等5步反应得到目标化合物盐酸替诺立定。反应总收率55。2%25。
- Difenoconazole was prepared with m-dichlorobenzene and acetyl chloride as starting materials by acetylation, etherification, bromination, cyclization and condensation. 摘要以间二氯苯、乙酰氯等为起始原料，经酰化、醚化、溴化、环化和缩合反应，合成了苯醚甲环唑。
- Methods Starting with 3-fluorophenyl isocyanate and(R)-epichlorohydrin,linezolid was synthesized through cyclization,substitution,acylation,bromination,and condensation. 方法以(R)环氧氯丙烷和间氟苯基异氰酸酯为起始原料,经环化、叠氮化、还原、酰化、溴代、缩合反应得到利奈唑酮。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
