IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0332396
(1981-12-18)
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우선권정보 |
CH-198009611 (1980-12-29); CH-198104666 (1981-07-16) |
발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
The novel benzimidazoles have the formula ##STR## in which A is the radical ##STR## R 1 is cyanomethyl, 1-cyanoethyl or, if n is the number 1, also 2-cyanoethyl or C 3-6 -carboalkoxymethyl, R 2 is C 1-4 -alkyl or C 3-4 -alkenyl, R 3 is cyanomethyl, cyanoethyl or C 3-6 -carboalkoxymethyl, R 4 and R 5
The novel benzimidazoles have the formula ##STR## in which A is the radical ##STR## R 1 is cyanomethyl, 1-cyanoethyl or, if n is the number 1, also 2-cyanoethyl or C 3-6 -carboalkoxymethyl, R 2 is C 1-4 -alkyl or C 3-4 -alkenyl, R 3 is cyanomethyl, cyanoethyl or C 3-6 -carboalkoxymethyl, R 4 and R 5 independently of one another are hydrogen or chlorine, X .crclbar. is a colorless anion of an organic or inorganic acid and n is the number 0 or 1. They are used for the fluorescent brightening of organic materials.
대표청구항
▼
1. A benzimidazole of the formula ##STR## in which A is the radical ##STR## R 1 is cyanomethyl, 1-cyanoethyl or 2-cyanoethyl, R 2 is C 1-4 -alkyl, R 3 is cyanomethyl, cyanoethyl or C 3-6 -carboalkoxymethyl, R 4 and R 5 independently of one another are hydrogen or chlorine, X - is a colorless anion o
1. A benzimidazole of the formula ##STR## in which A is the radical ##STR## R 1 is cyanomethyl, 1-cyanoethyl or 2-cyanoethyl, R 2 is C 1-4 -alkyl, R 3 is cyanomethyl, cyanoethyl or C 3-6 -carboalkoxymethyl, R 4 and R 5 independently of one another are hydrogen or chlorine, X - is a colorless anion of an organic or inorganic acid and n is the number 0 or 1, provided that when n is 0, R 1 is cyanomethyl or 1-cyanoethyl, and provided that when A is ##STR## and R 1 is cyanoethyl, R 3 is not cyanomethyl. 2. A benzimidazole according to claim 1 of the formula ##STR## in which A' is the radical ##STR## R 1 is cyanomethyl, 1-cyanoethyl or, if n is the number 1, also 2-cyanoethyl, R 2 ' is C 1-4 -alkyl, R 3 is cyanomethyl, cyanoethyl or C 3-6 -carboalkoxymethyl, X .crclbar. is a colourless anion of an organic or inorganic acid and n is the number 0 or 1. 3. A benzimidazole according to claim 1 of the formula ##STR## in which A" is the radical ##STR## or, if n is the number 1, also the radical ##STR## R 1 is cyanomethyl, 1-cyanoethyl or, if n is the number 1, also 2-cyanoethyl, R 2 ' is C 1-4 -alkyl, R 3 is cyanomethyl, cyanoethyl or C 3-6 -carboalkoxymethyl, R 4 is hydrogen or chlorine, X .crclbar. is a colourless anion of an organic or inorganic acid and n is the number 0 or 1. 4. A benzimidazole according to claim 2 of the formula ##STR## in which A'" is the radical ##STR## R 1 ' and R 3 ' independently of one another are cyanomethyl, or cyanoethyl R 3 ' is C 3-6 -carboalkoxymethyl and X .crclbar. is a colourless anion of an organic or inorganic acid. 5. A benzimidazole according to claim 4 of the formula ##STR## in which R 1 " is cyanoethyl and X .crclbar. is a colourless anion of an inorganic or organic acid. 6. A benzimidazole according to claim 4 of the formula ##STR## in which X .crclbar. is a colourless anion of an organic or inorganic acid. 7. The benzimidazole according to claim 3 of the formula ##STR##
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