Novel biaromatic compounds, which are vitamin D analogs, processes for their preparation and cosmetic, dermatological and pharmaceutical preparations containing one or more of these compounds.

The present invention relates to a method for preparing substituted styrene derivatives.

The present invention relates to a method for preparing substituted styrene derivatives.

A composition for resist underlayer film formation contains a compound having a group represented by formula (1), and a solvent. R.sup.1 represents an organic group having 2 to 10 carbon atoms and having a valency of (m+n), wherein the carbon atoms include two carbon atoms that are adjacent to each other, with a hydroxy group or an alkoxy group bonding to one of the two carbon atoms, and with a hydrogen atom bonding to another of the two carbon atoms; L.sup.1 represents an ethynediyl group or a substituted or unsubstituted ethenediyl group; R.sup.2 represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms; n is an integer of 1 to 3; * denotes a bonding site to a moiety other than the group represented by the formula (1) in the compound; and m is an integer of 1 to 3.

##STR00001##

A composition for resist underlayer film formation contains a compound having a group represented by formula (1), and a solvent. R.sup.1 represents an organic group having 2 to 10 carbon atoms and having a valency of (m+n), wherein the carbon atoms include two carbon atoms that are adjacent to each other, with a hydroxy group or an alkoxy group bonding to one of the two carbon atoms, and with a hydrogen atom bonding to another of the two carbon atoms; L.sup.1 represents an ethynediyl group or a substituted or unsubstituted ethenediyl group; R.sup.2 represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms; n is an integer of 1 to 3; * denotes a bonding site to a moiety other than the group represented by the formula (1) in the compound; and m is an integer of 1 to 3.

##STR00001##

Novel biaromatic compounds, which are vitamin D analogs, processes for their preparation and cosmetic, dermatological and pharmaceutical preparations containing one or more of these compounds.

Novel biaromatic compounds, which are vitamin D analogs, processes for their preparation and cosmetic, dermatological and pharmaceutical preparations containing one or more of these compounds.

The present invention relates to a method for preparing substituted styrene derivatives.

Novel biaromatic compounds, which are vitamin D analogs, processes for their preparation and cosmetic, dermatological and pharmaceutical preparations containing one or more of these compounds.

Novel biaromatic compounds, which are vitamin D analogs, processes for their preparation and cosmetic, dermatological and pharmaceutical preparations containing one or more of these compounds.