碳环的

Novel sodium 2-2-(alkylaryloxy-alkylamidoethanesulfonates (m+nAr-T, m, n: carbon numbers; Ar: aromatic nucleus; T: taurine) with high purity were synthesized through bromization, esterification, Fries rearrangement, Pd-catalyzed hydrogenation, Williamson reaction, and acylation, et al, using carboxylic acid, phenol and taurine as starting materials. The structures and purities were characterized.

以羧酸、苯酚和牛磺酸为原料，通过溴代反应、酯化反应、Fries重排反应、催化氢化反应、Williamson反应以及催化酰胺化反应等过程，首次成功合成并表征了系列结构明确的高纯度N-酰基牛磺酸钠(m+nAr-T，m、n为烷基链碳数，Ar为芳环，T表示taurine)。

In addition, the reactions of the carbodiimide with alkanol and substituted phenol were studied firstly.

研究了4-酯基吡唑-5-碳二亚胺(Pyrazole-5-N=C=N-Ar)与NH_3，RNH_2，R_2NH和RNHNH_2成环反应的选择性。

A carbonium ion mechanism combined with a bimolecular intermediate mechanism may be explained the isomerization of n-hexane on Pd/H-mordenite.

对正己烷在Pd/HM上的反应过程可用正碳离子机理结合双分子六元环中间物机理解释。

The results showed that:1 78 volatile constituents were identified in the oil,which were mainly caryophyllene,1,5,9,9-tetramethyl-1,4,7-cycloundecatriene,germacrone,eudesmol and furfural,etc.2 The aroma quality and intensity of cigarette were improved,irritation was reduced,and a...

结果表明：①满山红挥发油中共鉴定出78种挥发性成分，主要有石竹烯、1，5，9，9四甲基-1，4，7环十一碳三烯、杜鹃酮、桉叶醇和糠醛等；②该挥发油具有提高B2F和C3F等香气质和香气量，降低刺激性和改善余味的作用。

Aromatic rings can be joined at a pair of adjacent carbons to yield compounds such as naphthalene, anthracene and chrysene

芳环能在一对相邻碳上结合，生成萘、葸和？傅然增加凝聚剂用量会增大最后处理的污泥量。

Aromatic rings can be joined at a pair of adjacent carbons to yield compounds such as naphthalene, anthracene and chrysene

芳环能在一对相邻碳上结合，生成萘、葸和？傅然一头母牛每天产几加仑的牛奶。

An unusual intramolecular nucleophilic reaction of α carbon anion of crotonate was discovered and the imidazo[1,5 a ]pyridine derivatives were sythesized with a novel tandem reaction.

发现 5 咪唑甲醛(1)与γ溴代巴豆酸酯(2 )在弱碱条件下首先进行亲核取代反应生成 3，继而生成γ碳负离子并转移到α位，然后进行分子内亲核进攻成环、脱水生成 4的串联反应。

We researched on the prepartion of pivotal intermediate 2 and 3 for 1 P-methyl carbapenem antibiotics from intermediate 1, which is subjected to Reformastky reaction, N-alkylation, Dieckmann-type cyclisation, enolization, ester condensation etc. in sequence. The synthesis route of document is optimized by us.

我们研究了1β-甲基碳青霉烯类重要中间体的合成，从中间体1出发经Reformastky反应、水解反应合成出中间体2；经Reformastky反应、烷基化、Dieckmann环合、烯醇化、酯化合成出中间体3，并对其中各步反应作了优化和探索。

MethodsThe immunosuppressed mice were induced by cyclophosphamide and Fortunella crassifolia flavonoid was taken orally. The immunodulatory effects were measured by clearance rate K of charcoal particles, phagocytic index a, thymus and spleen index, ear swelling degree, HC50 value and so on.

方法环磷酰胺诱导小鼠免疫功能低下，予金橘黄酮，观察小鼠碳粒廓清指数K、吞噬指数a、胸腺和脾脏指数、耳肿胀度、血清溶血值（HC50）等指标的变化。

Results showed that during the carbonization of furfuralcohol resin C-O bond rupture of pentacyclic ring, took place firstly, bringine C-H bond rupture.

结果表明：糠醇树脂炭化裂解过程首先是五员杂环内的碳氧键发生断裂，引起碳氢键断裂。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。