Claims
- 1. A process for producing a mandelic acid ester of the formula Ib ##STR73## which process comprises reacting a corresponding .alpha.-halo-acetic acid ester of the formula IV ##STR74## with paraformaldehyde at 0.degree. to 140.degree. C. and with the desired azole of the formula VII ##STR75## in the presence of a base, or with the alkali salt of the azole, in an anhydrous solvent, wherein
- X is the bridge member --CH.dbd. or --N.dbd.,
- Ar is a phenyl, diphenyl or naphthyl group,
- R.sub.1, R.sub.2 and R.sub.3 independently of one another are each hydrogen, nitro, halogen, C.sub.1 -C.sub.3 -alkyl, C.sub.1 -C.sub.3 -alkoxy or C.sub.1 -C.sub.3 -haloalkyl,
- R.sub.5 is hydrogen, a C.sub.2 -C.sub.10 -alkenyl group which is unsubstituted or substituted by halogen, a C.sub.2 -C.sub.10 -alkynyl group which is unsubstiuted or substituted by halogen, or it is a C.sub.3 -C.sub.8 -cycloalkyl group, or a phenyl group which is unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, --CN or --CF.sub.3, or it is a C.sub.1 -C.sub.12 -alkyl chain, which from C.sub.2 -alkyl and up can be interrupted by oxygen or sulfur, or is C.sub.1 -C.sub.12 -alkyl which is unsubstituted or substituted by a member selected from the group consisting of halogen, C.sub.3 -C.sub.8 -saturated cycloalkyl, phenyl, --COO--alkyl(C.sub.1 -C.sub.4), --CO-alkyl(C.sub.1 -C.sub.4), --CO-phenyl and unsaturated or saturated 5- or 6-membered oxygen or sulfur
- and "Hal" is a halogen atom.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3674/81 |
Jun 1981 |
CHX |
|
2840/82 |
May 1982 |
CHX |
|
Parent Case Info
This is a division of application Ser. No. 383,398 filed on June 1, 1982 now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4331674 |
Kramer et al. |
May 1982 |
|
4366152 |
Kramer et al. |
Dec 1982 |
|
4366165 |
Miller et al. |
Dec 1982 |
|
4414210 |
Miller et al. |
Nov 1983 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
2640823 |
Mar 1977 |
DEX |
2908323 |
Sep 1980 |
DEX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
383398 |
Jun 1982 |
|