1) Loop closing
合环
1.
To assist the dispatcher with decision-making, software for loop closing operationanalysis is developed.
配电网络合环操作是电力系统运行中必不可少的环节,但由此产生的环流会直接影响到系统的安全稳定运行。
2.
In loop closing operation of distribution network, both stable state current and impactcurrent should be considered.
北京电网 10kV 配电出线带电倒负荷的操作频繁,因合环开关两侧母线或线路电压差的存在,可能使合环操作中产生的环流过大引起过流保护或速断保护误动。
3.
The anti-loop closing method of power supply and distribution system was introduced,and fully considered the stability,integrity,convenience of using and performance price ratio of investment of block.
对目前在用的几种闭锁方式进行了多角度对比,介绍了医院10kV及以下供配电系统防合环的闭锁设计方案,充分考虑了闭锁的可靠性、完整性、使用的便利性及投资性价比。
2) cyclization
[英][,saikli'zeiʃən] [美][,saɪklɪ'zeʃən, ,sɪklɪ-]
环合
1.
6,11-Dihydro-11-oxodibenz[b,e]oxepin-2-acetic acid(Ⅰ) was synthesized from Ⅲand acetyl chloride through two-step reactions including chlorination and cyclization.
Ⅲ与乙酰氯经氯化、环合得6,11-二氢二苯骈[b,e]氧杂-11-酮-2-乙酸(Ⅰ),该步优化的反应条件为:n(Ⅲ)∶n(乙酰氯)=1∶1。
2.
5,6-dihydro-6- methyl-4H- thieno[2,3-b] thiopyrane-4-one(3)was produced through chlorination by thionyl chloride and cyclization by anhydrous of aluminium chloride,and then 5,6-dihydro-6- methyl-4H- thieno[2,3-b]thiopyrane-4-one-2-sulfonamide(1)was produced through sulfonatio,chlorination and ammonolysis.
以丁烯酸和2-巯基噻吩为原料,经加成缩合制得3-(2-噻吩硫基)丁酸(2);以氯化亚砜氯化,三氯化铝催化环合得5,6-二氢-4H-6-甲基噻嗯并[2,3-b]噻喃-4-酮(3);再经磺化、氯化、氨解反应合成得5,6-二氢-4H-6-甲基噻嗯并[2,3-b]噻喃-4-酮-2-磺酰胺(1)。
3.
Hexahydropyridazine, an important pesticidal and pharmaceutical intermediate, was synthesized via cata-lytic cyclization and alcoholysis using diformylhydrazine and 1,2-dichlorobutane as starting reagents, with a totalyield of 77% and purity of 97.
六氢哒嗪是一种重要的农药和医药中间体,以二甲酰肼和1,2-二氯丁烷为主要原料,经催化环合和醇解2步反应合成六氢哒嗪,总收率77%,产品纯度97。
3) cyclocondensation
环合
1.
The target compounds were obtained in high yield through Michael conjugative addition of amines to methyl acrylates,cyclocondensation of the obtained diadducts in the presence of sodium methoxide,and decarboxylation of the cyclocondensation products in acid.
以胺类化合物为原料,与丙烯酸甲酯经过两次Michael加成得到N,N 二丙酸甲酯类化合物,该化合物在甲醇钠存在下进行环合,在酸性条件下脱羧,高收率得到4 哌啶酮类化合物,从而证明了这是一条合成N 取代 4 哌啶酮类化合物的普遍方法。
2.
N\|Aryl\|5,7\|dimethoxy\|1,2,4\|triazolo\pyrimidine-2\|sulfonamide(1) was prepared by the cyclocondensation of N\|Aryl\|5\|amino\|1,2,4\|triazole\|3\|sulfonamides with malonic acid in phosphorus oxychloride, followed by treatment with sodium methoxide\|methanol, to give 78.
以 N-( 2 -氯苯基 ) -5-氨基 -1 ,2 ,4-三唑 -3 -磺酰胺和 N-( 2 ,6-二氯苯基 ) -5-氨基 -1 ,2 ,4-三唑 -3 -磺酰胺为原料 ,与丙二酰氯 (由丙二酸与三氯氧磷反应得到 )进行环合 ,分别制得 N-( 2 -氯苯基 ) -5,7-二氯 -1 ,2 ,4-三唑 [1 ,5-a]嘧啶 -3 -磺酰胺和 N-( 2 ,6-二氯苯基 ) -5,7-二氯 -1 ,2 ,4-三唑 [1 ,5-a]嘧啶 -3 -磺酰胺。
3.
The reaction kinetics of cyclocondensation of propionaldehyde and ammonia of 2-ethyl-3,5-dimethylpyridine are studied on a fixed-bed reactor.
在固定床反应器中 ,研究了丙醛与氨环合的反应动力学特性 。
4) bridged compound
桥环环合物
5) ring-opening polymerization
开环聚合
1.
Activation of calix [6] arene in the ring-opening polymerization of ε-caprolactone catalyzed by rare earth aryloxide catalysts in low temperature.;
杯[6]芳烃在芳氧基稀土(镧、钕)催化ε-己内酯低温开环聚合中的活化作用
2.
Effect of initiators on enzyme-catalyzed ring-opening polymerization of ε-caprolactone;
引发剂对酶促开环聚合ε-己内酯的影响
3.
Viscosity model and its application for ring-opening polymerization of cyclic siloxane in presence of water;
有水条件下环硅氧烷开环聚合黏度模型及应用
6) cyclization
[英][,saikli'zeiʃən] [美][,saɪklɪ'zeʃən, ,sɪklɪ-]
环合反应
1.
In this paper,the title compound was synthesized through cyclization reaction of p-methylbenzoic acid,p-chloromethylbenzoic acid and p-nitrilbenzyl chloride with 4,6-diaminoresorcinol dihydrochloride.
分别以对甲基苯甲酸和对氯甲基苯甲酸以及对氰基氯苄为主要原料,与4,6-二氨基间苯二酚盐酸盐进行环合反应,合成了2,6-二(4-氯甲基苯基)苯并[1,2-d;5,4-d′]二噁唑,并采用IR,1H NMR和元素分析等分析方法对产物结构进行了确认。
2.
The intermediate of Tinoxicam,4-hydroxy-3-methyl-2H-thieno-1,2-thiazine-2-(methyl) carboxylate-1,1-dioxide(MHTTCD) was synthesized from methyl 3-amino-2-thiophene methyl carboxylate through four steps: chlorosulfonylation,methylamination,N-alkylation,and cyclization.
环合反应在甲醇钠的甲醇溶液中进行,合适的甲醇钠浓度为1mol/L。
3.
The synthesis of furan phenol through cyclization were studied, catalyzed by aluminium alkoxide and the affect of the catalyst weight against the selection of furan phenol and the feeding in or distilling out of the alcohol against the reaction yield of product.
采用醇铝作为呋喃酚环合反应催化剂,研究催化剂用量与呋喃酚选择性的关系,以及在反应体系中添加或采出醇对反应收率的影响。
补充资料：合环
1.犹周围。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条