4-acylaminophenylacetylenealcohol compounds

Details 4-acylaminophenylacetylenealcohol compounds 4-acylaminophenylacetylenealcohol compounds

1996-10-24

1998-03-31

Richter, Johann

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548511, 548513, 548536, 548543, 548545, 548547, 548549, 548556, 564184, 564186, 564187, 564218, 564223, C07C23740, C07D20712, C07D20724, C07D20948

Patent

active

057340633

ABSTRACT:
The present invention provides a method for preparation of a compound of the formula (I) useful as a fog restrainer for a silver halide light-sensitive material, especially for a heat-developing light-sensitive material and a synthetic intermediate for the fog restrainer. The method makes it possible to obtain the fog restrainer in good yield and in short steps. ##STR1## wherein, R.sup.1 is alkyl, cycloalkyl, or aryl, R.sup.2 and R.sup.3 are hydrogen atom or alkyl, R.sup.4 is hydrogen atom or acyl, and R.sup.1 and R.sup.4 may be bonded together to form 5- or 6-membered ring.

REFERENCES:
patent: 4301075 (1981-11-01), Lohmann et al.

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