To provide a novel method for producing a halogenated acrylic acid derivative. A compound represented by the formula (1): ##STR00001##
(wherein each of R.sup.1 and R.sup.2 which are independent of each other, is a hydrogen atom or a monovalent group essentially containing a carbon atom, or R.sup.1 and R.sup.2 together form a ring, R.sup.3 is a monovalent group capable of being desorbed by R.sup.3OH removal reaction, and each of R.sup.4 and R.sup.5 which are independent of each other, is a hydrogen atom or a monovalent group essentially containing a carbon atom) and having a boiling point of at most 500 C., is subjected to R.sup.3OH removal reaction in a vapor phase in the presence of a solid catalyst to obtain an ethene derivative represented by the formula (2): ##STR00002##
the ethene derivative represented by the formula (2) and a halogenated methane represented by the formula (3):
CHXYZ(3)
(wherein each of X, Y and Z which are independent of one another, is a halogen atom) are reacted in the presence of a basic compound and a phase transfer catalyst, to obtain a cyclopropane derivative represented by the formula (4): ##STR00003##
and the cyclopropane derivative represented by the formula (4) is reacted by heating in a liquid phase or in a vapor phase to obtain a halogenated acrylic acid ester derivative represented by the formula (5): ##STR00004##

Process for preparing an acetal from an olefin using PtI.sub.2 or PtBr.sub.2.

Process for preparing an acetal from an olefin using PtI.sub.2 or PtBr.sub.2.

Process for preparing an acetal from an olefin using PtI.sub.2 or PtBr.sub.2.

Process for preparing an acetal from an olefin using an iodine-alkyl compound.

Process for preparing an acetal from an olefin using an iodine-alkyl compound.

Process for preparing an acetal from an olefin using an iodine-alkyl compound.

Provided are a terminal conjugated trienal acetal compound useful as an intermediate for producing a terminal conjugated trienal compound, and a method for producing a terminal conjugated trienal compound through deprotection of the terminal conjugated trienal acetal compound. More specifically, provided are a terminal conjugated trienal acetal compound represented by General Formula (1); a method for producing a (Z,E)-terminal conjugated trienal acetal compound, the method comprising the step of: reacting a phosphonium salt represented by General Formula (7) with (E)-2,4-pentadienal through Wittig reaction to obtain a (Z,E)-terminal conjugated trienal acetal compound represented by General Formula (3); and a method for producing a terminal conjugated trienal compound, the method comprising the step of: deprotecting the terminal conjugated trienal acetal compound represented by General Formula (1) to obtain a terminal conjugated trienal compound represented by General Formula (2). ##STR00001##

Provided are a terminal conjugated trienal acetal compound useful as an intermediate for producing a terminal conjugated trienal compound, and a method for producing a terminal conjugated trienal compound through deprotection of the terminal conjugated trienal acetal compound. More specifically, provided are a terminal conjugated trienal acetal compound represented by General Formula (1); a method for producing a (Z,E)-terminal conjugated trienal acetal compound, the method comprising the step of: reacting a phosphonium salt represented by General Formula (7) with (E)-2,4-pentadienal through Wittig reaction to obtain a (Z,E)-terminal conjugated trienal acetal compound represented by General Formula (3); and a method for producing a terminal conjugated trienal compound, the method comprising the step of: deprotecting the terminal conjugated trienal acetal compound represented by General Formula (1) to obtain a terminal conjugated trienal compound represented by General Formula (2). ##STR00001##

A process of generating a glycerol ether is provided. The process includes reacting isobutylene with an alcohol to obtain a tertiary alkyl ether through an etherification reaction and generating a glycerol ether from the tertiary alkyl ether and glycerol through a transetherification reaction, A system for generating a glycerol ether is also provided.