A novel Rh(I)-catalyzed approach to synthesizing functionalized (E,Z) dienal compounds has been developed via tandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetallation step giving an (E,Z)-dienal. The reaction may be represented by the following sequence. ##STR00001##

A novel Rh(I)-catalyzed approach to synthesizing functionalized (E,Z) dienal compounds has been developed via tandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetallation step giving an (E,Z)-dienal. The reaction may be represented by the following sequence. ##STR00001##

The present invention relates to novel aldehyde compounds and their use as fragrance materials.

The present invention relates to novel aldehyde compounds and their use as fragrance materials.

A novel Rh(I)-catalyzed approach to synthesizing functionalized (E,Z) dienal compounds has been developed via tandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetallation step giving an (E,Z)-dienal. The reaction may be represented by the following sequence.

##STR00001##

A novel Rh(I)-catalyzed approach to synthesizing functionalized (E,Z) dienal compounds has been developed via tandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetallation step giving an (E,Z)-dienal. The reaction may be represented by the following sequence.

##STR00001##

A pattern-forming method comprises patternwise exposing a predetermined region of a resist material film made from a photosensitive resin composition comprising a chemically amplified resist material to a first radioactive ray that is ionizing radiation or nonionizing radiation having a wavelength of no greater than 400 nm. The resist material film patternwise exposed is floodwise exposed to a second radioactive ray that is nonionizing radiation having a wavelength greater than the wavelength of the nonionizing radiation for the patternwise exposing and greater than 200 nm. The chemically amplified resist material comprises a base component, and a generative component that is capable of generating a radiation-sensitive sensitizer and an acid upon an exposure. The generative component comprises a radiation-sensitive sensitizer generating agent. The radiation-sensitive sensitizer generating agent comprises a compound represented by formula (A).

##STR00001##

A novel Rh(I)-catalyzed approach to synthesizing functionalized (E,Z) dienal compounds has been developed via tandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetallation step giving an (E,Z)-dienal. The reaction may be represented by the following sequence. ##STR00001##

A novel Rh(I)-catalyzed approach to synthesizing functionalized (E,Z) dienal compounds has been developed via tandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetallation step giving an (E,Z)-dienal. The reaction may be represented by the following sequence. ##STR00001##

The presently claimed invention is directed to the use of 1-alkoxyethyl-4-isobutyl-benzene of formula (I) to impart an aroma impression to a composition. The presently claimed invention also relates to a method of imparting such aroma impression. The present invention is further directed to compositions comprising the compound of formula (I) and at least one aroma chemical as well as to compositions comprising the compound of formula (I) and at least one further component selected from the group consisting of aroma chemicals, surfactants, oil components, anti-oxidants, deodorant-active agents and solvents. The present invention also relates to a compound of formula (I).