The present invention provides 5-(2-butyl-1,3-dioxolan-2-yl)-1-methylpentyl acetate of the following formula (1).

The present invention further provides the aforesaid 5-(2-butyl-1,3-dioxolan-2-yl)-1-methylpentyl acetate (1), the process comprising the step of subjecting an organic magnesium compound (2) of the following general formula (2), wherein X.sup.1 represents a halogen atom or a 3-(2-butyl-1,3-dioxolan-2-yl) propyl group, to a nucleophilic addition reaction with propylene oxide of the following formula (3) and then reacting with an acetylating agent of the following general formula (4), wherein X.sup.2 represents a halogen atom, an acetoxy group, a methoxy group, or an ethoxy group, to form 5-(2-butyl-1,3-dioxolan-2-yl)-1-methylpentyl acetate (1).

##STR00001##

The present invention relates to a process for preparing a (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound of the following general formula (3-Z): wherein Y represents a halogen atom, Ar represents, independently of each other, an aryl group, and R.sup.1 and R.sup.2 represent, independently of each other, a monovalent hydrocarbon group having 1 to 15 carbon atoms, or R.sup.1 and R.sup.2 may form together a divalent hydrocarbon group, R.sup.1-R.sup.2, having 2 to 10 carbon atoms, the process comprising: subjecting a (7Z)-11-halo-1,1-dialkoxy-7-undecene compound of the following general formula (1-Z): wherein X.sup.1 represents a halogen atom, and R.sup.1 and R.sup.2 are as defined above to a phosphonium salt formation reaction with a phosphine compound of the following general formula (2): wherein Ar is as defined above to form the (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound (3-Z). ##STR00001##

The present invention relates to a process for preparing a (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound of the following general formula (3-Z): wherein Y represents a halogen atom, Ar represents, independently of each other, an aryl group, and R.sup.1 and R.sup.2 represent, independently of each other, a monovalent hydrocarbon group having 1 to 15 carbon atoms, or R.sup.1 and R.sup.2 may form together a divalent hydrocarbon group, R.sup.1-R.sup.2, having 2 to 10 carbon atoms, the process comprising: subjecting a (7Z)-11-halo-1,1-dialkoxy-7-undecene compound of the following general formula (1-Z): wherein X.sup.1 represents a halogen atom, and R.sup.1 and R.sup.2 are as defined above to a phosphonium salt formation reaction with a phosphine compound of the following general formula (2): wherein Ar is as defined above to form the (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound (3-Z). ##STR00001##

The present invention relates to a process for preparing a (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound of the following general formula (3-Z): wherein Y represents a halogen atom, Ar represents, independently of each other, an aryl group, and R.sup.1 and R.sup.2 represent, independently of each other, a monovalent hydrocarbon group having 1 to 15 carbon atoms, or R.sup.1 and R.sup.2 may form together a divalent hydrocarbon group, R.sup.1-R.sup.2, having 2 to 10 carbon atoms, the process comprising: subjecting a (7Z)-11-halo-1,1-dialkoxy-7-undecene compound of the following general formula (1-Z): wherein X.sup.1 represents a halogen atom, and R.sup.1 and R.sup.2 are as defined above to a phosphonium salt formation reaction with a phosphine compound of the following general formula (2): wherein Ar is as defined above to form the (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound (3-Z).

##STR00001##

The present invention relates to a process for preparing a (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound of the following general formula (3-Z): wherein Y represents a halogen atom, Ar represents, independently of each other, an aryl group, and R.sup.1 and R.sup.2 represent, independently of each other, a monovalent hydrocarbon group having 1 to 15 carbon atoms, or R.sup.1 and R.sup.2 may form together a divalent hydrocarbon group, R.sup.1-R.sup.2, having 2 to 10 carbon atoms, the process comprising: subjecting a (7Z)-11-halo-1,1-dialkoxy-7-undecene compound of the following general formula (1-Z): wherein X.sup.1 represents a halogen atom, and R.sup.1 and R.sup.2 are as defined above to a phosphonium salt formation reaction with a phosphine compound of the following general formula (2): wherein Ar is as defined above to form the (4Z)-11,11-dialkoxy-4-undecenyltriarylphosphonium halide compound (3-Z).

##STR00001##