SU568645A1 - Method of obtaining heterocyclic analogues of a-distyrylbenzol - Google Patents
Method of obtaining heterocyclic analogues of a-distyrylbenzolInfo
- Publication number
- SU568645A1 SU568645A1 SU7502154843A SU2154843A SU568645A1 SU 568645 A1 SU568645 A1 SU 568645A1 SU 7502154843 A SU7502154843 A SU 7502154843A SU 2154843 A SU2154843 A SU 2154843A SU 568645 A1 SU568645 A1 SU 568645A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- benzoxazolyl
- oxazolyl
- condensation
- distyrylbenzol
- obtaining
- Prior art date
Links
Description
1one
Изобретение относитс к улучшенному способу получени гетероциклических аналогов л-дистирилбензола, которые могут найти применение в квантовой электронике.This invention relates to an improved process for the preparation of heterocyclic analogs of l-distyrylbenzene, which can be used in quantum electronics.
Известен способ получени 1,4-ди- :р-(бензоксазолил-2 )-1винил - или 1,4-ди-{р-(бензотиазолил-2 ) -винил -бензола взаимодействием 2-метилпроизвод:НЫх соответствующих гетероциклов с терефталевым альдегидом в кип щем метаноле в присутствии метилата кали , едкого натра, хлористого цинка 1.A known method for the preparation of 1,4-di-: p- (benzoxazolyl-2) -1-vinyl - or 1,4-di- {p- (benzothiazolyl-2) -vinyl-benzene by the interaction of 2-methylproduct: of corresponding heterocycles with terephthalic aldehyde in boiling methanol in the presence of potassium methylate, caustic soda, zinc chloride 1.
Недостатком известного способа вл етс низкий выход целевого продукта (-10%).The disadvantage of this method is the low yield of the target product (-10%).
Целью изобретени вл етс повышение выхода целевого продукта и расширение ассортимента получаемых продуктов. Поставленна цель достигаетс описываемым способом получени гетероаиалогов л-дистирилбензола общей формулыThe aim of the invention is to increase the yield of the target product and expand the range of products obtained. The goal is achieved by the described method of obtaining heteroalogs of L-distyrylbenzene of the general formula
А-СН СН:н .сн-АA-CH CH: n.sn-A
дегидом в апротонном растворителе в присутствии едкого кали.dehydrated in an aprotic solvent in the presence of potassium hydroxide.
В качестве апротонного растворител предпочтительно использовать диметилформамид. Возможно использование гексаметанола, диметилсульфоксида .As an aprotic solvent, it is preferable to use dimethylformamide. The use of hexamethanol, dimethyl sulfoxide is possible.
Пример. К смеси 0,003 мол 2-метилбензоксазола и 0,1-0,16 мол КОН в 15-50 млExample. To a mixture of 0.003 mol of 2-methylbenzoxazole and 0.1-0.16 mol of KOH in 15-50 ml
диметилформамида прибавл ют по капл м при перемешивании при комнатной температуре раствор 0,01 мол терефталевого альдегида в 20 мл диметилформамида, перемешивание продолжают еще 1 ч. Затем реакционную массу разлагают прибавлением 10%-ной сол ной кислоты до слабокислой реакции, выпавший осадок 1,4-ди- р-(бензоксазолил-2)винил -бензола отфильтровывают, промывают водой и небольшим количеством (V 10 мл)dimethylformamide is added dropwise with stirring at room temperature a solution of 0.01 mol of terephthalic aldehyde in 20 ml of dimethyl formamide, stirring is continued for another 1 hour. Then the reaction mass is decomposed by adding 10% hydrochloric acid to a weak acid reaction, the precipitated 1,4 -dir- (benzoxazolyl-2) vinylbenzene is filtered off, washed with water and a small amount (V 10 ml)
метанола. Выход составл ет 95%- Очистка полученного соединени достигаетс перекристаллизацией из толуола.methanol. The yield is 95%. Purification of the compound obtained is achieved by recrystallization from toluene.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7502154843A SU568645A1 (en) | 1975-07-11 | 1975-07-11 | Method of obtaining heterocyclic analogues of a-distyrylbenzol |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7502154843A SU568645A1 (en) | 1975-07-11 | 1975-07-11 | Method of obtaining heterocyclic analogues of a-distyrylbenzol |
Publications (1)
Publication Number | Publication Date |
---|---|
SU568645A1 true SU568645A1 (en) | 1977-08-15 |
Family
ID=20626149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU7502154843A SU568645A1 (en) | 1975-07-11 | 1975-07-11 | Method of obtaining heterocyclic analogues of a-distyrylbenzol |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU568645A1 (en) |
-
1975
- 1975-07-11 SU SU7502154843A patent/SU568645A1/en active
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