长叶烯

结果表明，接种PWN使抗性马尾松种源中某些萜类组分如长叶烯等增多，而某些组分如反式石竹烯等减少；

The results showed that the inoculation led to increase of some components such as longifolene with the inoculated days in the H and M provenances , but led to decrease of some compounds such as trans caryophyllene in all three provenances .

以长叶烯为原料，一步合成异长叶烷酮，产率接近分步合成法。

The isolongifolanone was synthesized from the longifolene using a one-step method with a yield close to that of two-step method .

柱色谱法分离异长叶烯的Prins反应产物

Separation of the Prins Reaction Products of Isolongifolene by Column Chromatography

异长叶烯Prins反应及其产物的分离

The Prins Reaction of Isolongifolene and Separation of Products

异长叶烯的Prins反应产物（Ⅰ）和（Ⅱ）是制备具有持久的柏木油和岩兰草油香气，并兼有龙涎香和鼠尾草油香气的香料（Ⅴ）和（Ⅵ）的中间体。

( I ) and ( ⅱ ), products of Prins reaction of isolongifolene , are intermediates for preparing perfumery with a pronounced cedarwood-vetiver odour of great tenacity , and amber , clear sage dryout ( V ) and (ⅵ) .

以异长叶烯和醋酐为原料，经乙酰化反应合成乙酰基异长叶烯。

Acetyl-isolongifolene was prepared by C-acetylation reaction with isolongifolene and acetic anhydride .

通过甲酰基异长叶烯与酮的缩合反应合成出六种具有香气的新化合物。

Six types fragrant new compounds were synthesized by the condensation reactions of formylisolongifolene with ketones .

异长叶烯的制备工艺研究

Study on Process of Isolongifolene

异长叶烯的空气催化氧化反应

Air catalytic oxidation of Isolongifolene

长叶烯、β-石竹烯、α-檀香烯、雪松烯是重质松节油的主要成分。

Longifolene ,β - caryophyllene ,α - santalene and cedrene are the essential constituents of the heavy fraction of gum turpentine of Pinus massoniana .

水蒸气蒸馏法的提取物中鉴定出39种组分，其中的主要成分为α-蒎烯、β-蒎烯、β-水芹烯、异长叶烯、反式-石竹烯、莰烯。

Thirty-nine compounds were identified in the steam distillation extracts , the major components were α - pinene ,β - pinene ,β - phellandrene , trans-caryophyllene , isolongifolene and camphene .

其中含有α-蒎烯、Δ3-蒈烯、γ-松油烯、乙酸龙脑酯、乙酸萜品酯及长叶烯等，含量最多的成分是β-蒎烯（36.536%）。

The principal constituents of the volatile oil were β pinene ( 36 536 % ),α pinene ,Δ 3 carene ,γ terpinene , bornyl acetate , terpinyl acetate , longifolene etc. The total content of the above 33 compounds is 99 79 % of the volatile oil .

不同龄级的油松松脂中长叶烯含量差异不显著：长叶烯在相同的坡位不同的坡向、相同的坡向不同的坡位含量不同；

There were no significant differences of the longifolene contents among pine age grades but varied among pines at different slope directions and positions .

通过比较几种Lewis酸对长叶烯异构化反应的催化效果，选择了LS-98作为长叶烯异构化反应的较为理想的催化剂。

LS-98 is used as a catalyst for isomerizing reaction of longifolene to iso longifolene , in consequence of its higher catalytic effect than other a few of Lewis acid catalysts .

研究了SO42-/TiO2-ZrO2型固体超强酸催化剂的制备及其催化长叶烯的异构反应，通过GC、GC-MS和标样分析，确定其主产物为异长叶烯。

The reactions of isomerization of longifolene catalyzed by SO ~ 2 - _4 / TiO_2-ZrO_2 solid superacid are performed . From analyses of GC and GC-MS , the main product is isolongifolene from isomerization .