Swiss patent (application?) 605512A
PUB-NO: CH000605512A
DOCUMENT-IDENTIFIER: CH 605512 A
TITLE: TITLE DATA NOT AVAILABLE
PUBN-DATE: September 29, 1978
INVENTOR-INFORMATION:
NAME COUNTRY
MILLAUER, HANS DR N/A
PISTORIUS, RUDOLF N/A
ASSIGNEE-INFORMATION:
NAME COUNTRY
HOECHST AG N/A
APPL-NO: CH01156376
APPL-DATE: September 10, 1976
PRIORITY-DATA: CH01156376A (September 10, 1976)
INT-CL_(IPC): C07C043/28
EUR-CL (EPC): C07C041/00; C07C043/28
ABSTRACT:
Chlorinated hydroquinone dimethylethers prepn. from para benzoquinone
tetramethylketals and hydrochloric acid in one step
Patent CH605512 (http://l2.espacenet.com/dips/viewer?PN=CH605512&CY=gb&LG=en&DB=EPD)
Maybe you can substitute HBr or HI for HCl to get the Br and I derivatives.
http://www.geocities.com/dritte123/PSPF.html
The hardest thing to explain is the obvious