SU713858A1 - Method of preparing stilbene and its alkylderivatives - Google Patents

Method of preparing stilbene and its alkylderivatives Download PDF

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Publication number
SU713858A1
SU713858A1 SU782598216A SU2598216A SU713858A1 SU 713858 A1 SU713858 A1 SU 713858A1 SU 782598216 A SU782598216 A SU 782598216A SU 2598216 A SU2598216 A SU 2598216A SU 713858 A1 SU713858 A1 SU 713858A1
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USSR - Soviet Union
Prior art keywords
stilbene
alkylderivatives
alkyl derivatives
benzyl chloride
dehydrochlorination
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SU782598216A
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Russian (ru)
Inventor
Михаил Григорьевич Воронков
Владимир Гаврилович Козырев
Ольга Борисовна Банникова
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Иркутский институт органической химии СО АН СССР
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Priority to SU782598216A priority Critical patent/SU713858A1/en
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Publication of SU713858A1 publication Critical patent/SU713858A1/en

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Description

Изобретение относитс  к органическому синтезу, а именно к способу получени  диароксиэтиленов общей формулы ( где R - Н, Alk 1,2-Диарилэтилены наход т применение в качестве промежуточных продуктов в органическом синтезе. Простейший представитель этих соединений - стильбен примен ют дл  получени  монокристаллов. Известен способ получени  соединений данного р да из дибензила tl. Недостатком этого способа  вл етс  слбжность аппаратурного оформлени . По технической сущности к предлагаемому способу наиболее близОк способ получени  стильбена или его алл килпроизводных дегидрохлорированием) хлористого бензила или его алкилпроизводных при нагревании с использова нием в качестве отщепл ющего средства спиртовой щелочи 2. Недостатками этого способа  вл ютс  необходимость проведени  реакции в агрессивной среде и применение в св зи с этим специальной аппаратуры , а также большой расход исходного реагента. С целью упрощени  технолоп и процесса по предлагаемому способу гидро- хлорирование хлористого бензила и его алкилпроизводных провод т термически в токе инертного газа при 600650°С и в присутствии 1-5 вес.% инициатора (метанола при пиридина). Ниже приведены примеры получени  стильбена или его алкилпроизводных. Пример 1. Стильбен. Через кварцевую трубку диаметром 28 мм и длиной 750 мм, нагретую до в токе азота (скорость газа 30-35 мл/мин), пропускают 126,5 г хлористого бензила в смеси с 1,2 вес.% метанола (мол рное соотношение 1:0,05) со скоростью 0,5 мл/мин. Продукты реакции собирают в охлажденной ловушке. После разгонки конденсата получают 28,5 г хлористого бензила и 50 г транс-стильбена, т.кип.The invention relates to organic synthesis, in particular, to a method for producing diaroxyethylenes of the general formula (where R is H, Alk 1,2-Diarylethylenes are used as intermediate products in organic synthesis. The simplest representative of these compounds is stilbene, which is used to obtain single crystals. Known The method of obtaining compounds of this series from dibenzyl tl. The disadvantage of this method is the lack of instrumentation.The technical essence of the proposed method is the closest way to obtain stilb ene or its all-derivative with dehydrochlorination) benzyl chloride or its alkyl derivatives when heated using alcohol alkali as a splitting agent 2. The disadvantages of this method are the need to carry out the reaction in an aggressive environment and use in connection with this special equipment, as well as large initial reagent consumption. In order to simplify the technolop and the process according to the proposed method, the hydrochlorination of benzyl chloride and its alkyl derivatives is carried out thermally in a stream of inert gas at 600650 ° C and in the presence of 1-5 wt.% Of the initiator (methanol with pyridine). Below are examples of the preparation of stilbene or its alkyl derivatives. Example 1. Stilben. Through a quartz tube with a diameter of 28 mm and a length of 750 mm, heated to a stream of nitrogen (gas velocity 30-35 ml / min), 126.5 g of benzyl chloride in a mixture with 1.2 wt.% Methanol is passed (molar ratio 1: 0.05) at a rate of 0.5 ml / min. The reaction products are collected in a cooled trap. After distillation of the condensate, 28.5 g of benzyl chloride and 50 g of trans-stilbene are obtained, b.p.

Claims (1)

Формула изобретения , Способ получения стильбена или его алкилпроизводных дегидрохлорированием хлористого бензила или его алкилпроизводных при нагревании, отличающийся тем, что, с целью упрощения технологии процесса, дегидрохлорирование проводят термически при 600-650°С в токе инертного газа и в присутствии 1-5 вес.% метанола или пиридина.'The claims, the Method for producing stilbene or its alkyl derivatives by dehydrochlorination of benzyl chloride or its alkyl derivatives by heating, characterized in that, in order to simplify the process technology, dehydrochlorination is carried out thermally at 600-650 ° C in an inert gas stream and in the presence of 1-5 weight. % methanol or pyridine. '
SU782598216A 1978-02-20 1978-02-20 Method of preparing stilbene and its alkylderivatives SU713858A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU782598216A SU713858A1 (en) 1978-02-20 1978-02-20 Method of preparing stilbene and its alkylderivatives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU782598216A SU713858A1 (en) 1978-02-20 1978-02-20 Method of preparing stilbene and its alkylderivatives

Publications (1)

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SU713858A1 true SU713858A1 (en) 1980-02-05

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SU782598216A SU713858A1 (en) 1978-02-20 1978-02-20 Method of preparing stilbene and its alkylderivatives

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