SU1400508A3 - Способ получени производных арилтиазолов - Google Patents

Способ получени производных арилтиазолов Download PDF

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SU1400508A3
SU1400508A3 SU864027210A SU4027210A SU1400508A3 SU 1400508 A3 SU1400508 A3 SU 1400508A3 SU 864027210 A SU864027210 A SU 864027210A SU 4027210 A SU4027210 A SU 4027210A SU 1400508 A3 SU1400508 A3 SU 1400508A3
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Алан Рестер Лоренс
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Abstract

Изобретение относитс  к гетероциклическим соединени м, в частности к способу получени  2-(1-н-гек- сил-3-гуанидино)-4-(3-метил-, или амино-1Н-1,2,4-триазол-5-ил)тиазо- лов Cl), (II), которые могут использоватьс  в медицине. Получение соединений I и II ведут из гидразида 1- -(Т-н-гексил-3-гуанидино) тиазол-4- -карбсновой кислоты и тиоацетамидом или солью 5-метш1Изотиурони  при мол рном соотношении 1:55-1,5 в среде бутанола при температуре его кипени  с обратным холодильником. Выход,%: т.пл. °Cj брутто фор-ла дл  соединени  I 39; 207-209; дл  соединени  II 53; 210-211; С ,. 2 табл. g С

Description

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Изобретение относитс  к способу получени  новых химических биологиче еки активных соединений, конкретно к йпособу получени  производных арил- tиaзoлoв-2-{N-замещенных гуанидино)- ( 15 2,4-триазол-5-ют) тиазолов, обладающих способностью блокировать действие гистамин-Н -рецептораСан- тагонисты гистамин-Н -рецептора), ингибировать секрецию кислоты, вход щей в состав желудочного сока, и ингибировать образование  звы желудка, вызываемой алкоголем. Эти соединени  могут быть полезны дл  предотвраще- Н1ИЯ и лечени  повьшенной желудочной кислотности и пептических  зв.
; Целью изобретени   вл етс  полу- ч|ение новых производных 2(М-заме- щённых гуанидино)-4-(1,2,4-триазол- -5-ил)-тиазолов,, которые могут най- ,тй применение в медицине в качестве антагониста гистамина-Н-, а также обладающих новым видом активности дл  р да арилтиазолов - способностью ин гибировать образование  звы желудкг, вызывающей алкоголем.
Все значени  температуры указаны в градусах Цельси . Спектры  дерного магнитного резонанса (ЯМР) измерены дл  растворов в дейтерированном хлот роформе .(CDCI3 ), дейтерированном метаноле (CDjO) или дейтерированном дйметилсульфоксйде (DMBO-df,) и положени  пиков даны в пол х на ил ЛИОН в нисход щей области от тетра- метилсилана. Дл  форм пиков примен ютс  следующие сокращени : bS - широкий синглет; S - синглет; d - дублет; t - триплет; q - квартет; m - мультиплет,,
П р и -м е р 1. Этил-2-(1-н-гек- сил-3-гуанидина)тиазол-4-карбоксн- лат.
Смесь 1-(н-гексилгуанил) тиокар- б;|мида (4,09 г, 20 ммолъ), этилбром- эфира пировиноградной кислоты (4,09 21 ) и 200 мл этанола нагревают с обратным холодильником в течение 4 ч и охлаждают. Смесь концентрируют в вакууме до желтого твердого вещества, которое обраба1 ьшшот насьш1енным раствором кислого углекислого натри  и экстрагируют хлороформом . Высушенные экстракты концентрируют в вакууме до оранжевого масла, которое отверждают посредством растирани  с гексаном. После пере криста.плизации из смеси гексана
0 5
0 5 0
5
0
5
с этилацетатом получают г (62%) желтых кристаллов. Обработка маточных растворов дает дополнительно 1,20 г (20%) продукта. Пробу дл  анализа получают перекристаллизац- ей из гексана с этилацетатом, температура плавлени  118-119 С.
Масс спектр (га/е) : 298 (); Н - тР (CDClj ) доли на 1 млнЛс/): 0.,6-1,8 (т, 14 Н); 3,2 (т, 2 Н) j 4,3 (q, 1 7 Hj, 2 Н); 7,03 (S, пга- рокий, 3 Н); 7,41 (5, 1 Н).
Вычислено,%: С 52,32| Н 7,43; N 18,78.
НайденоД: С 52,41; Н 7,55; N 18.36.
Пример 2. 2-(1-н-гексил-З- -гуанидино) тиазол-4-карбоновой кислоты гидразид.
Смесь 3,36 г (11,3 ммоль) этил- -2-(1-н-Гексил-З-гуанидино) тиазол- -4-карбоксш1ата и 6,5 мп (110 моль) 38%-ного гидразингидрата в 110 мл этанола нагревают с обратным холодильником в течение 24 ч. Добавл ют дополнительно 6,5 мл гидразингидрата и продолжают : нагревание еще 24 ч.. Полученную, смесь охлаждают, растворитель выпаривают в вакууме, остаточное бесцветное твердое вещество растирают в порошок с изопропанолом и фильтруют. Получают 2,32 г (78%) бесцветного порошка, Про(5у дл  анализа получают перекристаллизацией из изопропанола, температура плавлени  136-137°С. Масс спектр (т/е): 284. (); Н-ЯМР (DMSO-d /CDsOD) доли на млн. (с/ ): 0,7-1,7 (т, 11 Н); 3,2 . (т, 2 Н); 7,31 (S, 1 Н).
Вычислено,%: С 46,45; Н 7,09; N 29,55.
C H oNgOS
Найдено,%г ,С 46,10; Н 7,18; N 29,93,
Пример 3. 2-(1-н-гексил-3- -гуанидино)-4-(3-метил-1Н-1,2,4-три- азол-5-ил) тиазол (I)/
Смесь 568 мг (2,0 ммоль) 2-(1-н- -гекси.п-3-гуанидино) тиазол-4-карбо- новой кислоты гидразида, 751 мг (МО моль) тиоацетамида в 20 мл н-бутанола нагревают с обратным холодильником в течение 48 ч. Охлажденную реакционную смесь концентрируют в вакууме и остаток хроматографируют на колонке с силикагелем, что дает 241 мг (39%) чистого триазола в виде
10
15
20
желтой губчатой массы, температура плавлени  207-209°С. Масс спектр (га/е): 307 (М ); Н - ЯМР (CDOD) доли на млн. (сГ): 0,7-1,8 (т, 11 Н); 2,43 (S, 3 Н); 3,3 (т, 2 Н); 7,22 (S, 1Н).
Вычислено, %: С 49,34; Н 7,01,- N 30,99.
С ,И-,5 0,5Н20
Найдено, %: С 49,42; Н 6,73; N 30,82.
Пример 4. 2-(1-н-гексил-3- гуанидино)-4-(3-амино-1Н-1,2,4-три- азол-5-ил) тиазол (11).
Смесь 852 мг (3,0 ммоль) 2-(1-н- -гексил-3-гуанидино)-тиазол-4-кар- боновой кислоты гидразида, 835 мг (4,5 ммоль) S-метилизотиуроний сульфата и 492 мг натри  ацетата и 30 мл н-бутанола нагревают с обратным холодильником в течение 4 ч и охлаждают . Полученную смесь фильтруют, фильтрат концентрируют в вакууме и остаток хроматографируют дважды на колонках с силикагелем, сначала от- мьшают из адсорбента 85:15 хлороформом/метанолом , затем ацетоном, что дает 491 мг (53%) указанного в заголовке соединени  в виде твердого жел- 30 того вещества, температура плавлени  210-211 с. Масс спектр (т/е) 308 (М); Н - ЯМР (CDjOD) доли на млн. (Ю: 0,7-1,9 (т, 11 Н); 3,2 (т, 2 Н); 7,13 (S, 1 Н)..35
Вычислено, N 36,34.
С jH joNgS
Найдено, %: N 36,03.40
Пример 5. Активность в отношении противодействи  к гистами- ну-Н.
Ак тивность соединений по предла- гаемому изобретению, противодейству- 45 кщему гистамину-Hj, определ ют по следующей методике.
Морских свиной быстро умерщвл ют ударом по голове, удал ют сердце и правую артерию препарируют так, что- 50 бы она была свободной. Артерию подвешивают изометричес ки в тканевой ванне с регулируемой температурой (32i2°C;. Эта ванна (10 мл) содержит оксигемированный (95% 5% СО7) 55 буфер (рН 7,4) Кребса-Хензелейта. Оставл ют дл  стабилизации примерно на 1 ч. За это врем  тканевую ванну промывают несколько раз сильной стру25
q 46,73; Н 6,54;
С 46,63; Н 6,42;
0
5
0
0 5
0
5
0 5
ей жидкости. Отдельные сокращени , относ щиес  к предсердию, прослеживают с помощю приспособлени , передающего смещение от усили , соединенного с кардиотахометром и регистрирующим полиграфом Грасса. После получени  кривой, выражающей зависимость между дозой и ответной реакцией со стороны гистамина, ванну, содержащую каждое предсердие, промывают несколько раз сильной струей свежего буфера и предсердие привод т в равновесие с основными частотами. После возвращени  к основной частоте, добавл ют испытуемые соединени  при избранных окончательных концентраци х и снова определ ют кривую доза гистамина - ответна  реакци . Определ ют отношение концентрации гистамина, требуемое дл  получени  половины максимального стимулировани  в присутствии или отсутствии антагониста и вычисл ют константу 5 кажущейс  диссоциации Н -рецептора антагониста р А. Результаты испытаний приведены в табл.2.
Пример 6.
Ингибирование образовани   зв, вызываемых этанолом у крыс.
Противо звенную активность продуктов согласно изобретению также определ ют у крысы посредством проверки  звы, вызьшанной этанолом. При этом испытании самцам крыс, зафиксированным всю ночь, дают лекарство (при 30 или 3 мг/кг) или воду путем приема через рот за 15 мин до приема через рот дозы абсолютного этанола (1,0 мл). Через 1 ч после этанольного вызова животных (по 8 в группе) убивают и исследуют желудок на наличие повреждений. Путем оперативного вмешательства вскрьша- ют желудок и у привратника желудка устанавливают замь1кающий гемостат. В желудок ввод т инъекцией 6 мл 4%- ного раствора формальдегида через желудо.чный зонд и дл  запирани  пищевода устанавливают второй замыкающий челюстат. Желудок извлекают, вскрывают вдоль наибсшьшей кривизны и исследуют на образование  зв,
Система подсчета, примен ема  дл  определени  количества повре зде- ний, вызыванных этанолом, приводитс  в табл,1.
лее 2, могут присутствовать точечные повреждени 
: 5 Повреждени  с кровотечением
Дл  каждой группы животных вычис- л  ют индекс  звы, как показано далее
Индекс  звы - (сумма повреждений дл  каждой группы)X(сумма числа  зв в каждой )х(дол  в группе, име г ца   звы в любой степени развити ) .
Ннгибирование образовани   зв, выраженной в %, вьпшсл ют так:
% ингибировани  100х(индекс  з- вМ .у контрольных) - (индекс  звы у пЬлучивших лекарство)} :(индекс  звы у; контрольных) о
Результаты испытаний по цитозащи- те приведены в табл.2.
Таблица 2 Активность в отношении противодействие; к гистамину-Н и цитозащитна  активность производных арилтиазола и циме- тидина
ог
TH-
7,0
7,2
7,8
6,4
1,21 0,90 0,8
1,0
21
66
О
Не активен
почтительно принимать лекарства через рот. Обычно соединени  формулы (I) подлежат введению через рот при приблизительных дозировках в пределах
О,Г до 20 мг/кг веса тела субъекта, которого лечат в сутки, предпочтительно примерно от 0,2 до 2,5 мг/кг в сутки в единичной или разделенной на несколько частей дозах. Если желательно введение с лечебной целью, мину  пищеварительньй тракт, то данные соединени  можно давать в виде общих суточных доз в пределах около 0,1 и 1,0 мг/кг веса тела субъектанаход щегос  на излечении.
Таким образом, полученные предлагаемым способом соединени  обладают низкой степенью токсичности по отношению к человеку.
35
Форм у л а и 3 о б р ё т е н и  
Способ получени  производньгх арилтиазолов общей формулы (I)
V
40S
кгN jr- il HN NH2 H-CgH
45
tf.
ъг I
н
50
i
где R - метил или аминогруппа; отлич ающийс  тем, что гидразид кислоты формулы
$
J-П
II
H-CeHia
1 H CONHNHg
1400508
подвергают взаимодействию с .тиоаце- 1,5 соответственно в среде бутанола тамидом или солью S-метилизотиуро- при температуре его кипени  с-об- ни  при мол рном соотношении Is55 - ратным холодильником.

Claims (1)

  1. • Форм ул а и з о б р е те н и я
    Способ получения производных арилтиазопов общей формулы (I)
    Соединение, №
    Аналог
    Циметидин
    Ант мина-Н рА2 ~7~0 ~
    7,2
    7,8
    6,4 агонизм гистаг
    Откос, рост на косом агаре
    Г, 2?'
    0,90
    0,8
    Цитозащита
    ЕД5о (% защиты при
    30 мг (кг) , орально
    1,0 н-с6нй
    R - метил или л и ч а ю щ и где о т гидразид кислоты формулы аминогруппа;
    й с я тем, что
    Не активен conhnh2 подвергают взаимодействию с .тиоацетамидом или солью S-метилизотиурония при молярном соотношении 1:55 -
    1,5 соответственно в среде бутанола при температуре его кипения с-обратным холодильником.
SU864027210A 1984-04-30 1986-04-02 Способ получени производных арилтиазолов SU1400508A3 (ru)

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