A method for producing 2,2′-bis(carboxymethoxy)-1,1′-binaphthyl includes performing steps (i) to (iv) below in sequence using a 2,2′-bis(alkoxycarbonylmethoxy)-1,1′-binaphthyl as a starting material: (i) a hydrolysis reaction step, (ii) a step of distilling off a resulting alcohol represented by formula (3) above from a reaction system, (iii) a step of acidifying a reaction solution, and (iv) a step of precipitating 2,2′-bis(carboxymethoxy)-1,1′-binaphthyl in the presence of an organic solvent.

A method for producing 2,2′-bis(carboxymethoxy)-1,1′-binaphthyl includes performing steps (i) to (iv) below in sequence using a 2,2′-bis(alkoxycarbonylmethoxy)-1,1′-binaphthyl as a starting material: (i) a hydrolysis reaction step, (ii) a step of distilling off a resulting alcohol represented by formula (3) above from a reaction system, (iii) a step of acidifying a reaction solution, and (iv) a step of precipitating 2,2′-bis(carboxymethoxy)-1,1′-binaphthyl in the presence of an organic solvent.

A method for producing 2,2′-bis(carboxymethoxy)-1,1′-binaphthyl includes performing steps (i) to (iv) below in sequence using a 2,2′-bis(alkoxycarbonylmethoxy)-1,1′-binaphthyl as a starting material: (i) a hydrolysis reaction step, (ii) a step of distilling off a resulting alcohol represented by formula (3) above from a reaction system, (iii) a step of acidifying a reaction solution, and (iv) a step of precipitating 2,2′-bis(carboxymethoxy)-1,1′-binaphthyl in the presence of an organic solvent.

The present invention provides a process for preparing 2-(1,5,5-trimethyl-2-cyclopentenyl)ethyl acetate of the following formula (3), wherein Ac represents an acetyl group, the process comprising: subjecting a haloacetaldehyde alkyl 3,4,4-trimethyl-2-cyclopentenyl acetal compound of the following general formula (1), wherein R represents a linear or branched alkyl group having 1 to 4 carbon atoms, and Y represents a halogen atom, to a dehydrohalogenation reaction in the presence of a base, followed by a rearrangement reaction to obtain a (1,5,5-trimethyl-2-cyclopentenyl)acetate compound of the following general formula (2), wherein R is as defined above, and subjecting the alkoxycarbonylmethyl group (i.e., —CH.sub.2C(═O)OR) of the (1,5,5-trimethyl-2-cyclopentenyl)acetate compound (2) to a multi-step conversion to be converted into a 2-acetoxyethyl group (i.e., —CH.sub.2CH.sub.2OAc) to obtain 2-(1,5,5-trimethyl-2-cyclopentenyl)ethyl acetate (3).

##STR00001##

The present invention provides a process for preparing 2-(1,5,5-trimethyl-2-cyclopentenyl)ethyl acetate of the following formula (3), wherein Ac represents an acetyl group, the process comprising: subjecting a haloacetaldehyde alkyl 3,4,4-trimethyl-2-cyclopentenyl acetal compound of the following general formula (1), wherein R represents a linear or branched alkyl group having 1 to 4 carbon atoms, and Y represents a halogen atom, to a dehydrohalogenation reaction in the presence of a base, followed by a rearrangement reaction to obtain a (1,5,5-trimethyl-2-cyclopentenyl)acetate compound of the following general formula (2), wherein R is as defined above, and subjecting the alkoxycarbonylmethyl group (i.e., —CH.sub.2C(═O)OR) of the (1,5,5-trimethyl-2-cyclopentenyl)acetate compound (2) to a multi-step conversion to be converted into a 2-acetoxyethyl group (i.e., —CH.sub.2CH.sub.2OAc) to obtain 2-(1,5,5-trimethyl-2-cyclopentenyl)ethyl acetate (3).

##STR00001##

The present invention relates to a process for preparing a process for preparing a (2-cyclopentenyl)acetate ester compound of the following general formula (2): wherein R represents a linear or branched alkyl group having 1 to 4 carbon atoms, Y represents a halogen atom, and X.sub.1 to X.sub.7 represent, independently of each other, a hydrogen atom or a methyl group, with the proviso that one to three among X.sub.1 to X.sub.7 represent a methyl group and the remaining represent a hydrogen atom, the process comprising: subjecting a haloacetaldehyde alkyl 2-cyclopentenyl acetal compound of the following general formula (1): wherein R is as defined above, X.sub.1 to X.sub.7 are as selected in the general formula (2), respectively, and Y represents a halogen atom, to a dehydrohalogenation reaction in the presence of a base, followed by a rearrangement reaction to form the (2-cyclopentenyl)acetate ester compound (2) and a process for preparing a (2-cyclopentenyl)acetic acid compound of the following general formula (3): wherein X.sub.1 to X.sub.7 are as selected in the general formula (1), respectively, the process comprising hydrolyzing the (2-cyclopentenyl)acetate ester compound (2) to form the (2-cyclopentenyl)acetic acid compound (3). The present invention relates also to the novel compound, haloacetaldehyde alkyl 2-cyclopentenyl acetal compound (1).

##STR00001##

The present invention relates to a process for preparing a process for preparing a (2-cyclopentenyl)acetate ester compound of the following general formula (2): wherein R represents a linear or branched alkyl group having 1 to 4 carbon atoms, Y represents a halogen atom, and X.sub.1 to X.sub.7 represent, independently of each other, a hydrogen atom or a methyl group, with the proviso that one to three among X.sub.1 to X.sub.7 represent a methyl group and the remaining represent a hydrogen atom, the process comprising: subjecting a haloacetaldehyde alkyl 2-cyclopentenyl acetal compound of the following general formula (1): wherein R is as defined above, X.sub.1 to X.sub.7 are as selected in the general formula (2), respectively, and Y represents a halogen atom, to a dehydrohalogenation reaction in the presence of a base, followed by a rearrangement reaction to form the (2-cyclopentenyl)acetate ester compound (2) and a process for preparing a (2-cyclopentenyl)acetic acid compound of the following general formula (3): wherein X.sub.1 to X.sub.7 are as selected in the general formula (1), respectively, the process comprising hydrolyzing the (2-cyclopentenyl)acetate ester compound (2) to form the (2-cyclopentenyl)acetic acid compound (3). The present invention relates also to the novel compound, haloacetaldehyde alkyl 2-cyclopentenyl acetal compound (1).

##STR00001##

An autocatalytic process for producing fatty acids from fatty acids methyl esters with an overall conversion higher than 90% which includes multiple hydrolysis reactions in series, in purely thermal conditions, with intermediate separation of phases after each hydrolysis reaction and before the subsequent, operating in excess of water, in order to separate the methanol/water phases from the equilibrium phase and favor the formation of fatty acids product.

An autocatalytic process for producing fatty acids from fatty acids methyl esters with an overall conversion higher than 90% which includes multiple hydrolysis reactions in series, in purely thermal conditions, with intermediate separation of phases after each hydrolysis reaction and before the subsequent, operating in excess of water, in order to separate the methanol/water phases from the equilibrium phase and favor the formation of fatty acids product.

An autocatalytic process for producing fatty acids from fatty acids methyl esters with an overall conversion higher than 90% which includes multiple hydrolysis reactions in series, in purely thermal conditions, with intermediate separation of phases after each hydrolysis reaction and before the subsequent, operating in excess of water, in order to separate the methanol/water phases from the equilibrium phase and favor the formation of fatty acids product.