Cyclobutenedione derivative, process for preparing the same, and

Details Cyclobutenedione derivative, process for preparing the same, and Cyclobutenedione derivative, process for preparing the same, and

1995-04-14

1997-08-19

Burn, Brian M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

257 40, C07C21135

Patent

active

056590857

ABSTRACT:
The present invention provides a novel chemical substance suitable for practical organic nonlinear optical element having a high nonlinear optical effect, a process for the preparation thereof, and a nonlinear optical element prepared from such a chemical substance. A novel cyclobutenedione derivative prepared in accordance with the following reaction formula, a process for the preparation thereof, and a nonlinear optical element comprising such a derivative are provided: ##STR1## wherein Z represents an oxygen atom or a sulfur atom; R.sup.1 represents an alkyl group, an alkenyl group or an alkynyl group; R.sup.2 represents a hydrogen atom, an alkyl group, an alkenyl group or an alkynyl group; and C* represents an asymmetric carbon atom, with the proviso that R.sup.1 and R.sup.2 may be connected to each other to form a methylene chain and that the hydrogen atom(s) in R.sup.1 may be substituted by a halogen atom, an alkyloxy group or a cyano group.

REFERENCES:
patent: 4986935 (1991-01-01), Ageishi et al.
patent: 5106997 (1992-04-01), Pu
patent: 5210302 (1993-05-01), Pu

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