戊烷沥青质中以迫位缩合的芳香环系结构为主，胶质组分中渺位缩合与迫位缩合的芳香环系结构各占相当比例。
The aromatic structure of pentane asphaltenes is mainly peri condensed, while for resins the proportion of cata condensed and peri condensed aromatic structures is comparable.
诸多文献所报道的咪唑啉化合物的合成大都是以羧酸和有机胺为原料在一定温度和条件下酰胺化缩合脱水成环。
In many references, the imidazoline type inhibitors were synthesized from carboxylic acid and organic amine dehydration that formed a cycle under certain temperature and condition.
控制缩合反应的温度，还得到一种苯并环庚酮和一种苯并环戊烷。
One benzosuberone and one benzocyclopentane are synthesized when controlling the condensation reaction temperature.
IR光谱分析同样反映出沥青经催化氧化后分子结构中侧链减少，芳环上的氢减少，整个芳环的缩合程度增加。
Meanwhile IR analysis showed that side chain between molecule and hydrogen of aromatic ring were decreased, condensed degree was increased in catalytic oxidation.
以氮杂环庚—2—酮和1—溴十二烷为原料合成氮酮，用氢氧化钾为反应缩合剂，PEG—400为相转移催化剂。
Synthesis of azone was carried out from azacycloheptan-2-one and 1-bromododecane using KOH as condensation agent and PEG-400 as phase transfer catalytic agent.
将异丁醛与1,4丁烯二醇缩合得到产物二氧七环，对产物进行了元素分析和IR分析。
The condensation compound was synthesized by 2 butene 1, 4 diol and iso butyric aldehyde, and was characterized by elemental analysis and IR.
用己二胺、 己二酸及双功能团的氯化螺环磷酸酯经界面缩合制得含磷尼龙66。
Phosphorus containing ny1on-66 was prepared by the interphase condensation between adipic acid, hexamethylenediamine and dichloropentate.
以对甲苯乙酮和三氟醋酸乙酯为原料，经缩合、环合两步反应得到2型环氧酶抑制剂赛来昔布，总收率为6 7%。
Celecoxib as a cyclooxygenase-2 inhibitor, was synthesized from p-methylacetophenone and ethyl trifluoroacetate by successively condensation and cyclization in 67% overall yield.
羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基越多，缩合越困难。
The groups in ring of benzaldehydes, no matter they are electron withdrowing or electron donating except of hydroxy, do not seem to have much effect on the yield.
中性油层析分离为3个馏分：环己烷洗脱馏分（C1）主要为四环以下纯缩合化合物；
The neutral bio-oi1 can be separated into three fractions: The fraction washed down by cyclohexane (C1) mainly contains aromatics with up to four rings;
中性油层析分离为3个馏分：环己烷洗脱馏分（C1）主要为四环以下纯缩合化合物；
The neutral bio-oi1 can be separated into three fractions: The fraction washed down by cyclohexane (C1) mainly contains aromatics with up to four rings;
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