Claims
- 1. A furan of the formula ##STR9## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently alkyl of 1 to 4 carbon atoms or phenyl;
- and the phenyl rings A and B are independently unsubstituted or are substituted by alkyl of 1 to 4 carbon atoms or halo.
- 2. A furan according to claim 1, wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are alkyl of 1 to 4 carbon atoms and the phenyl rings A and B are unsubstituted.
- 3. The furan according to claim 1 of the formula ##STR10##
- 4. A process for the preparation of a furan of the formula ##STR11## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently alkyl of 1 to 4 carbon atoms or phenyl;
- and the phenyl rings A and B are independently unsubstituted or are substituted by alkyl of 1 to 4 carbon atoms or halo;
- which comprises reacting
- a. the naphtholactone of the formula ##STR12## with b. at least one aniline of the formula ##STR13## wherein Y and Y' are each hydrogen, at 150.degree. to 220.degree. C.
- 5. Process according to claim 4, which comprises reacting at 175.degree. to 205.degree. C.
- 6. Process according to claim 4, which comprises reacting in the presence of a potentially acid salt.
Priority Claims (1)
Number |
Date |
Country |
Kind |
16635/73 |
Nov 1973 |
CH |
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Parent Case Info
This is a divisional of application Ser. No. 524,850, filed on Nov. 18, 1974 and now U.S. Pat. No. 3,974,180.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
2894003 |
Long et al. |
Jul 1959 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
524850 |
Nov 1974 |
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