Claims
- 1. A process for producing at least one methyl-substituted, propyl-substituted pentamethyl indane derivative defined according to the structure: ##STR87## wherein R.sub.1 represents methyl; R.sub.2 represents chloro and R.sub.3 represents hydrogen; and wherein the structure represents a mixture wherein, in the mixture, in one of the compounds, R.sub.4 and R.sub.4 ' are both methyl; and in the other compounds one of R.sub.4 or R.sub.4 ' is methyl and the other is ethyl; comprising the steps of:
- (i) first carrying out the reaction: ##STR88## then carrying out the reaction: ##STR89## wherein, in the structure: ##STR90## the said structure is a mixture wherein, in the mixture one of R.sub.5 or R.sub.5 ' is ethyl and the other of R.sub.5 or R.sub.5 ' is methyl.
- 2. The process of claim 1 wherein the chlorinating agent is SOCl.sub.2.
- 3. The process of claim 1 wherein the reaction: ##STR91## is carried out in the presence of a chloro-Lewis acid catalyst selected from the group consisting of:
- SnCl.sub.4
- TiCl.sub.4
- AlCl.sub.3
- Diethyl aluminum chloride and
- Ethyl aluminum dichloride.
Parent Case Info
This is a divisional of application Ser. No. 08/214,229, filed on Mar. 17, 1994 now U.S. Pat. No. 5,376,630 as originally filed.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3532719 |
Theimer |
Oct 1970 |
|
3910964 |
Sanders et al. |
Oct 1975 |
|
4162256 |
Sprecker et al. |
Jul 1979 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
214229 |
Mar 1994 |
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