The subject matter described herein is directed to compounds, synergistic compositions, and methods for repelling arthropods. The compositions comprise acids, esters, aldehydes, or alcohols of pyrethroid-type compounds. The compounds, particularly the pyrethroid-type acids, demonstrate excellent repellency when applied both alone and in synergistic compositions.

The subject matter described herein is directed to compounds, synergistic compositions, and methods for repelling arthropods. The compositions comprise acids, esters, aldehydes, or alcohols of pyrethroid-type compounds. The compounds, particularly the pyrethroid-type acids, demonstrate excellent repellency when applied both alone and in synergistic compositions.

The present invention belongs to the technical field of fine chemicals and relates to a new crystalline form of tefluthrin, a preparation method therefor and the use thereof. The preparation method specifically comprises: taking an amorphous tefluthrin or a solid tefluthrin other than the tefluthrin as described in the present invention as a raw material, firstly preparing the raw material into an amorphous substance at room temperature, and then allowing the amorphous substance to cool to 5° C. to −24° C. to obtain a white or light yellow solid, i.e., a new crystalline form of tefluthrin.

The present invention belongs to the technical field of fine chemicals and relates to a new crystalline form of tefluthrin, a preparation method therefor and the use thereof. The preparation method specifically comprises: taking an amorphous tefluthrin or a solid tefluthrin other than the tefluthrin as described in the present invention as a raw material, firstly preparing the raw material into an amorphous substance at room temperature, and then allowing the amorphous substance to cool to 5° C. to −24° C. to obtain a white or light yellow solid, i.e., a new crystalline form of tefluthrin.

The present invention relates to a cyclopropenium salt bearing an electron withdrawing group suitable for use as a reagent in cyclopropenylation reactions of formula (I). The invention also relates to a process for their preparation, the use thereof as cyclopropenylation reagent, to an electrophilic aromatic substitution process of cyclopropenylation, and to a process for cyclopropenylation of organometallic substrates using said reagents.

##STR00001##

The present invention relates to a cyclopropenium salt bearing an electron withdrawing group suitable for use as a reagent in cyclopropenylation reactions of formula (I). The invention also relates to a process for their preparation, the use thereof as cyclopropenylation reagent, to an electrophilic aromatic substitution process of cyclopropenylation, and to a process for cyclopropenylation of organometallic substrates using said reagents.

##STR00001##

The invention relates to compounds of formula (I) and to their use in treating or preventing an inflammatory disease or a disease associated with an undesirable immune response:

##STR00001## wherein R.sup.A1, R.sup.A2, R.sup.1 to R.sup.5, L and R.sup.B are as defined herein.

The invention relates to compounds of formula (I) and to their use in treating or preventing an inflammatory disease or a disease associated with an undesirable immune response:

##STR00001## wherein R.sup.A1, R.sup.A2, R.sup.1 to R.sup.5, L and R.sup.B are as defined herein.

Provided are the crystalline form of tefluthrin of formula (I), the crystal preparation process, the analyses of the crystal through various analytical methods and using the crystal to prepare stable agrochemical formulation. Also provided is the use of various solvents towards the crystalline form preparation conditions.

Provided are the crystalline form of tefluthrin of formula (I), the crystal preparation process, the analyses of the crystal through various analytical methods and using the crystal to prepare stable agrochemical formulation. Also provided is the use of various solvents towards the crystalline form preparation conditions.