烯酮

Unsaturated alkynyl alcohols, such as dehydronerolidol, dehydrogeranyllinalool, and dehydroisophytol, were prepared by ethynylation of turpentine derivatives, namely terpenylacetones, e. g. geranylacetone, farnesylacetone, and phyton under normal pressure in presence of alkali metal hydroxide and organic solvents.

松节油衍生物格萜烯基丙酮，如香叶基丙酮、金合欢基丙酮和植物酮在常压条件，碱金属氢氧化物和有机溶剂存在下可发生乙炔化反应，形成对应的α，β-不饱和炔醇化合物脱氢橙花叔醇、脱氢香叶基芳樟醇和脱氢异植物醇。

The preparation of six types of organoborane reagents based on pinene was reviewed,and the progress in the reduction reactions of ten classes of ketones and in their application was outlined.

综述了由蒎烯衍生的六种有机硼还原剂的合成方法，并讨论了这些还原剂对十类不同类型酮的还原反应及其应用。

For utilization the untouchable skeleton of sapogenin, we started from tigogenin , through oxidation , opening of E, F ring, turning...

于是我们从剑麻皂甙元出发，经七步反应得到胆甾-3，26-二乙酸酯-16烯-22酮，总收率35.9％。

The classes of these compounds included triterpenoid, diterponid, sesquiterpene, steroid, lignan, flavone, coumarin, phenol, and fatty acid.

已鉴定的化合物类型涉及单萜、环烯醚萜、倍半萜、二萜、三萜、木脂素、黄酮、脂肪酸、甾醇、香豆素、酚酸和其它类型的化合物。

Results Seven known compounds: ocotillol (1), ursolic acid (2), betulin (3), lupeol (4), 1β-hydroxy-lupeol (5),β-sitosterol (6) and sitosterol-4-en-3-one (7) were isolated.

结果 分离得到7个化合物，分别鉴定为：20S，24R-环氧达玛烷－3β，25-二醇(ocotillol， 1)、熊果酸(2)、白桦脂醇(3)、羽扇豆醇(4)、1β-羟基羽扇豆醇(5)、β-谷甾醇(6)、谷甾－4-烯－3-酮(7)。

Even's air-drying method for meiotic preparations from germ cells of mammalian testes improved by our laboratory was used and dynamic change of division figure of prophase 1 in the mouse treated by testosteronic propionas and stilbestrol was observed.

采用本室改良的Evens哺乳动物睾丸生殖细胞减数分裂空气干燥法制片技术，观察了用丙酸睾丸酮和已烯雌酚处理小鼠第一次减数分裂前期分裂相染色体的动力学变化。

15K. It is shown that two main factors, pressure and the polarity of the mixture, influence the EAA tautomerism.

结果表明，EAA的酮式-烯醇式异构化平衡常数随共溶剂极性的增加而减小。

Methods Naloxone was synthesized starting from oxidation of thebaine, followed by hydrogenation, acylation, cyanidation, O-demethylation, hydrolyzation and N-allylation. The alternative method of O-demethylation, methane sulfonic acid/DL-methionine and hydrobromic acid were investigated.

在以蒂巴因为原料，经氧化、氢化、酰化、氰化、去氧甲基、水解、N-烯丙基化得到纳洛酮的合成路线中，分别采用甲磺酸／DL-甲硫氨酸和氢溴酸代替三溴化硼进行去氧甲基化和后续水解反应。

Result The results showed that its components were quite complex, and 89 organic compounds were identified. There were 72 kinds of oxygen-containing organic compounds which included esters, phenols, aethers, ketones and alcohols in the depolymerization product, small amounts of alkanes, alkenes, arenes, thiophenol and nitrogen-containing organic compounds were also detected, which showed that characteristics of the product with high oxygen content, low nitrogen and sulphur content.

结果］超临界乙醇解聚产物成分十分复杂，GC/MS分析鉴定出89种有机化合物，其中72种为含氧化合物，主要有酯、酚、醚、酮和醇等，还检测出少量烷烃、烯烃、芳烃、苯硫酚和含氮化合物，反映了解聚产物的高含氧量和低含氮硫量的特性。

Extensive experimentation revealed several issues, along with several corresponding solutions:(1) given that lithium metal dissolves slowly in liquid ammonia, considerable time was required to generate the dissolved metal solution (ca. 1 h);(2) the t -BuOH must be freshly distilled prior to use 21 to diminish the formation of ketone 19 (Figure 2);(3) efficient capture of the lithium enolate ( 11 ) required the use of freshly distilled TMSCl and Et 3 N; and (4) the presence of residual thiophenol upon workup was found to inhibit the subsequent Sc 3 -promoted hydroxymethylation.

大量实验揭示若干问题，随着几个对策 1鉴于锂金属溶化慢慢液氨、需要相当多的时间创造了金属溶液溶解(约占1小时)；(2) T恤使操作必须事先用新鲜蒸馏水形成酮减少2119(图2)；有效捕获的锂烯醇(11)使用新鲜蒸馏水需氯和ET三氮；含有残余硫workup经发现抑制随后推选3-羟甲晋升。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。