2-(4-SUBSTITUTED PHENYLAZO)PHENANTHRENE DERIVATIVE

Title:

2-(4-SUBSTITUTED PHENYLAZO)PHENANTHRENE DERIVATIVE

Document Type and Number:

Japanese Patent JPS59231059

Kind Code:

A

Abstract:

NEW MATERIAL:The compound of formula I or formula II (A is alkyl or acyl).

EXAMPLE: 2-(4-Alkoxyphenylazo)phenanthrene.

USE: A liquid crystal display element. It has excellent liquid crystal properties. It exhibits a nematic liquid crystal phase at a relatively high temperature range, and is useful as a liquid crystal display element for high-temperature use.

PREPARATION: The compound of formula I can be prepared by reacting 2-(4- hydroxyphenylazo)phenanthrene of formula III with an alkyl halide, acyl halide or acid anhydride, etc. As an alternative method, the compound of formula II is prepared by (1) reducing the compound of formula III with hydrated hydrazine and palladium carbon in ethanol, (2) subjecting to the diazo-coupling with phenol, and (3) reacting the product with an alkyl halide, acyl halide or acid anhydride, etc.

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Inventors:

NAGAI YOSHIO
SUGIURA MICHIO

Application Number:

JP10475983A

Publication Date:

December 25, 1984

Filing Date:

June 12, 1983

Export Citation:

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Assignee:

NAGAI YOSHIO
SUGIURA MICHIO
SHINNITTETSU KAGAKU

International Classes:

C09K19/32; C07C67/00; C07C241/00; C07C245/10; (IPC1-7): C09K3/34

Attorney, Agent or Firm:

Naruse Katsuo

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