戊烯

All of these products have the carbon-carbon linkage to the cyclopentadiene ring.

由^1H NMR、IR、元素分析等确认R和环戊二烯上碳直接相连，具有典型的碳碳连结。

Methods The target compounds were synthesized from cyclopentanone via Stork reaction, Mannich reaction and selective reduction.

方法以环戊酮为起始原料，通过Stork烯胺反应、Mannich反应、选择性还原制备目标化合物；以二甲苯致小鼠耳肿胀模型测试目标化合物的抗炎活性。

Methods The target compounds were synthesized from cyclopentanone via Stork reaction, Mannich condensation, amine exchange and selective reduction. Xylene-induced mice ear edema assay was used to evaluate their anti-inflammatory activity.

以环戊酮为起始原料，通过Stork烯胺反应、Mannich缩合反应、胺交换反应和选择性还原制备目标化合物；以二甲苯致小鼠耳肿胀模型测试目标化合物的抗炎活性。

Methods The target compounds were synthesized from cyclopentanone via Stork reaction, Mannich condensation , amine exchange and selective reduction. Xylene-induced mice ear edema assay was used to evaluate their anti-inflammatory activity.

以环戊酮为起始原料，通过Stork烯胺反应、Mannich缩合反应、胺交换反应和选择性还原制备目标化合物；并以二甲苯致小鼠耳肿胀模型测试目标化合物的抗炎活性。

The poisoning effects of alkyl sulfur compounds on the reactivity of isoprene hydrogenation over supported Pd catalyst are more and more serious with the decrease of the molecular mass of alkyl thiols and dialkyl disulfides.

乙硫醇和二甲基二硫醚使Pd／树脂催化剂中毒的机理是，它们分别在催化剂上发生SH和S-S键断裂，并与Pd形成带烷基基团的S-Pd吸附络合物，致使催化剂上异戊二烯选择加氢活性降低。

In this paper, the thermally reversible crosslinking reaction and the properties of synthesized TPE based on the reactions of chlorine containing polymers such as PVC , chlorined polyethylene , epichlorohydrin rubber and acrylic rubber with salts of dicyclopenladienyl dicarboxylate crosslinking agents were studied.

本研究以环戊二烯二酸盐衍生物作热可逆共价交联剂，通过与聚氯乙烯、氯化聚乙烯、氯醚橡胶和丙烯酸酯橡胶等含氯聚合物的脱MX酯化反应来实现共价关联，并制取相应的新型TPE。

The cyclic dipentene in C 5 raw material was taken off by heat polymerization .

以大庆石化总厂C5馏分为原料，经热聚工艺脱除环戊二烯，采用自制络合AlCl3 催化剂，合成了浅色C5石油树脂。

The protic- or Lewis acid catalyzed ring-closure of divinyl ketones (and their acid-labile precursors) pentadienylic cations is known as the via Nazarov cyclization.

质子酸或路易斯酸通过戊二烯基阳离子催化二乙烯酮的环闭合（以及它们的酸不稳定前体）这个反应被称为Nazarov环化。

The effect of different factors was investigated and the main process conditions were obtained: addition temperature120~140℃,esterify temperature:160~175℃,n:n=3~4:1mol:mol）,n(DCPD:n =0.6~0.8:1mol:mol）,the amount of catalyst is

双环戊二烯的含量低于80%，研究了各种影响因素，得出主要工艺条件：加成温度为120~140℃，酯化温度为160~175℃，n：n=3~4：1，n：n=0.6~0.8：1，催化剂用量为0.1~0.2%，树脂收率达

The leftover from bamboo processing was comminuted into bamboo fine powder, which was surface-treaded with a coupling agent of ethenyl tri (β-methoxyethoxy) silane; and then in the presence of initiator dicumyl peroxide, the powder was compounded with styrene-isoprene block copolymer/bromobutyl rubber blend to prepare a crosslinked vibration-absorbing rubber composite material.

将竹加工的边角料粉碎并用乙烯基三硅烷偶联剂处理，再与苯乙烯－异戊二烯嵌段共聚物和溴化丁基橡胶的共混物进行复合，在过氧化二异丙苯引发剂的作用下制得交联型橡胶吸振复合材料。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新