The present invention relates to a process of manufacturing of allene ketone using specific ammonium (thio)sulfates or hydrogen (thio)sulfates as catalyst. The reaction provides the allene ketone in high yields and selectivities.

Processes for conversion of propylene polyol feed into useful petrochemical products, including olefin monomers, are described. Such processes comprise: adding a feed stream comprising one or more propylene polyols to a dehydration cleavage reaction zone in the presence of a dehydration cleavage catalyst and reacting at a pressure and temperature sufficient to form a product stream comprising propionaldehyde, a dioxolane component, and a dioxane component; and adding the product stream and hydrogen to a dehydration reaction zone in the presence of a hydrogenation catalyst to form and reacting at a pressure and temperature sufficient to form a second product stream comprising a propanol component. The second product can be added to a dehydration reaction zone in the presence of a dehydration catalyst and reacted at a pressure and temperature sufficient to form a third product stream comprising propylene.

Processes for conversion of propylene polyol feed into useful petrochemical products, including olefin monomers, are described. Such processes comprise: adding a feed stream comprising one or more propylene polyols to a dehydration cleavage reaction zone in the presence of a dehydration cleavage catalyst and reacting at a pressure and temperature sufficient to form a product stream comprising propionaldehyde, a dioxolane component, and a dioxane component; and adding the product stream and hydrogen to a dehydration reaction zone in the presence of a hydrogenation catalyst to form and reacting at a pressure and temperature sufficient to form a second product stream comprising a propanol component. The second product can be added to a dehydration reaction zone in the presence of a dehydration catalyst and reacted at a pressure and temperature sufficient to form a third product stream comprising propylene.

A method of making spirogalbanone includes the steps of: (a) subjecting ethynylspirodecanol to a Rupe rearrangement to give a compound of the formula I ##STR00001## (b) converting the compound of (a) to a C1-C4 alkyl acetal; (c) subjecting the acetal to a trans-acetalization reaction with allyl alcohol in the presence of a mild acid catalyst; (d) heating the product of (c) in the presence of an acid catalyst to give an allylenolether; and (e) subjecting the product of (d) to a Claisen rearrangement to give spirogalbanone. The method affords an easier and more efficient method of preparation.

A method of making spirogalbanone includes the steps of: (a) subjecting ethynylspirodecanol to a Rupe rearrangement to give a compound of the formula I ##STR00001## (b) converting the compound of (a) to a C1-C4 alkyl acetal; (c) subjecting the acetal to a trans-acetalization reaction with allyl alcohol in the presence of a mild acid catalyst; (d) heating the product of (c) in the presence of an acid catalyst to give an allylenolether; and (e) subjecting the product of (d) to a Claisen rearrangement to give spirogalbanone. The method affords an easier and more efficient method of preparation.

A method of making spirogalbanone includes the steps of: (a) subjecting ethynylspirodecanol to a Rupe rearrangement to give a compound of the formula I

##STR00001## (b) converting the compound of (a) to a C1-C4 alkyl acetal; (c) subjecting the acetal to a trans-acetalisation reaction with allyl alcohol in the presence of a mild acid catalyst; (d) heating the product of (c) in the presence of an acid catalyst to give an allylenolether; and (e) subjecting the product of (d) to a Claisen rearrangement to give spirogalbanone.

The method affords an easier and more efficient method of preparation.

A method of making spirogalbanone includes the steps of: (a) subjecting ethynylspirodecanol to a Rupe rearrangement to give a compound of the formula I

##STR00001## (b) converting the compound of (a) to a C1-C4 alkyl acetal; (c) subjecting the acetal to a trans-acetalisation reaction with allyl alcohol in the presence of a mild acid catalyst; (d) heating the product of (c) in the presence of an acid catalyst to give an allylenolether; and (e) subjecting the product of (d) to a Claisen rearrangement to give spirogalbanone.

The method affords an easier and more efficient method of preparation.

The present invention relates to the manufacture of gamma, delta-unsaturated ketones from tertiary vinyl carbinols and vinylic ethers or ketals using an organic tertiary or quaternary ammonium salt as catalyst.

Disclosed is an LED light source photocatalytic tubular reactor and application thereof. The LED light source photocatalytic tubular reactor comprises an LED light source, a temperature control chamber and a transparent reaction pipeline; the transparent reaction pipeline is located in the temperature control chamber; at least one side of the temperature control chamber is a light-transmitting plate; the LED light source provides a light source for the transparent reaction pipeline through the light-transmitting plate; and the transparent reaction pipeline has a diameter-to-length ratio of the inner diameter to the length of 0-0.1, but not 0. The LED light source continuous photocatalytic tubular reactor of the present disclosure can eliminate the scaling up effect, increase the yield and allow continuous production with an advantage of easy to use and low cost. The tubular reaction device of the present disclosure can also realize automatic control, which can effectively reduce personnel costs and improve production safety.

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##