expansion ring

expansion ring的基本解释

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伸缩环, 膨胀圈

与expansion ring相关的网络例句 [注：此内容来源于网络，仅供参考]

When the radical center is located at the bridge methyl group, ring expansion is the favored rearrangement pathway unless a radical-stabilizing substituent is placed in the cyclobutyl ring adjacent to the bridge methyl group.

当自由基中心位于双环的桥甲基时，扩环过程占主导地位，但是与桥甲基相邻的环丁基上存在能够稳定自由基的取代基时，重排以开环为主。

Moreover, we explored the three-carbon radical chain extension and ring expansion.

此外，初步探索了增加三个碳原子的自由基反应。

In this thesis, we want to describe the new one-carbon chain extension and ring expansion of 1,3-diketones, which is the first report based on our knowledge.

本文在前人的研究基础上，首次发现了开链1，3-二酮增加一个碳原子的自由基链增长反应和环状1，3-二酮增加一个碳原子的自由基扩环反应。

In this thesis, we want to describe the new one-carbon and three-carbon chain extension and ring expansion of 2-aroyl-3,4-dihydro-2H-naphalen-l-one, which is the first report based on our knowledge.

本文在前人的研究基础上，首次开展了α—芳酰基苯并环己酮增加一个碳原子和三个碳原子的自由基扩环和链增长反应，以及自由基加成成环反应。

The results showed that the addition leading to -2-phenyl-2-(2-vinylpiperidin-1-yl) ethanol 7 could proceed with good diastereoselectivity and excellent yield (95%).(3) The selective N-deprotection of -2-phenyl-2-(2-vinylpiperidin-1-yl) ethanol 2 without affecting the vinyl group in the substrate were untaken.(4) The Zip reaction for the transformation of -1-(3-aminopropyl)-3-methylazecan-2-one 8 to -7-Methyl-1, Sdiaza-cyclotetradecan-6-one 9 were undertaken. The results showed that, under controlled conditions, acceptable yields (43%) could be achieved and racemization can be minimized during the ring expansion reaction.

该合成路线与文献方法相比，反应条件较温和，也缩短了反应时间；(2)哌啶衍生物2与乙烯基格氏试剂进行加成反应的条件和立体选择性，取得了较好的结果（差向异构体比为80：20，产率95％左右）；(3)不饱和哌啶衍生物7在不影响碳碳双键的情况下去除苯基甘氨醇手性辅助基的条件；(4)具有羰基α位手性的氨基酰胺8在不同条件下经Zip重排反应转变为9的反应，控制反应条件，可使反应中消旋化减小到最小的程度。

与expansion ring相关的网络解释 [注：此内容来源于网络，仅供参考]

expansion ring：伸缩圈

expansion ratio 膨胀比 | expansion ring 伸缩圈 | expansion stroke 膨胀行程

expansion ring：膨胀圈

expansion ring 膨胀环 | expansion ring 膨胀圈 | expansion section 扩散段

expansion ring：膨胀环

expansion ratio 展缩比 | expansion ring 膨胀环 | expansion ring 膨胀圈

expansion ring：水带箍

expansion ratio 发泡倍数 | expansion ring 水带箍 | expansion trunk 膨胀舱

packing expansion ring：填料膨胀圈

密封元件挤胀 packing element extrusion | 填料膨胀圈 packing expansion ring | 充填液 packing fluid