Thiophene derivative and process for preparing the same

Details Thiophene derivative and process for preparing the same Thiophene derivative and process for preparing the same

1988-06-27

1989-08-15

Siegel, Alan

Electric lamp and discharge devices: consumable electrodes

With economizer

514438, 549 60, 549 75, 549 77, A61K 3138, C07D40900, C07D33312

Patent

active

048575437

ABSTRACT:
A thiophen derivative of the formula: ##STR1## wherein R.sup.1, and R.sup.2 and R.sup.3 are a lower alkyl group, Ring A is phenyl, a lower alkylenedioxy-substituted phenyl, a phenyl group having 1 to 3 substituent(s) selected from the group consisting of a lower alkyl group, a lower alkylthio group, a lower alkoxy group, a phenyl-lower alkoxy group, a lower alkoxycarbonyl group, a halogen atom, amino group and hydroxy group, X is --OCO--, --O-- or --S--, m and n are an integer of zero or 1, and p and q are an integer of zero, 1 or 2, or a salt thereof.

REFERENCES:
patent: 3122561 (1964-02-01), Cason et al.
patent: 4128551 (1978-12-01), Braye
Chemical Abstracts 99: 175393b.

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