A process for the preparation of a class of molecules, namely bicyclo[1.1.1]pentanes and derivatives thereof by reaction of [1.1.1]propellane with a variety of reagents under irradiation and/or in the presence of radical initiators to obtain bicyclo[1.1.1]pentanes asymmetrically substituted at position 1 and 3, which are useful as intermediates for the preparation of asymmetrically 1,3-disubstituted bicyclo[1.1.1]pentane derivatives and various physiologically active substances or materials containing these structures.

A process for the preparation of a class of molecules, namely bicyclo[1.1.1]pentanes and derivatives thereof by reaction of [1.1.1]propellane with a variety of reagents under irradiation and/or in the presence of radical initiators to obtain bicyclo[1.1.1]pentanes asymmetrically substituted at position 1 and 3, which are useful as intermediates for the preparation of asymmetrically 1,3-disubstituted bicyclo[1.1.1]pentane derivatives and various physiologically active substances or materials containing these structures.

A carbon nanobelt represented by formula (1) was synthesized by chemical synthesis:

wherein each Ar is identical or different and represents an aromatic hydrocarbon ring; each R.sup.1 is identical or different and represents hydrogen, alkyl, aryl, or alkoxy; and n represents an integer of 0 or more.

A carbon nanobelt represented by formula (1) was synthesized by chemical synthesis:

wherein each Ar is identical or different and represents an aromatic hydrocarbon ring; each R.sup.1 is identical or different and represents hydrogen, alkyl, aryl, or alkoxy; and n represents an integer of 0 or more.

A carbon nanobelt represented by formula (1) was synthesized by chemical synthesis:

wherein each Ar is identical or different and represents an aromatic hydrocarbon ring; each R.sup.1 is identical or different and represents hydrogen, alkyl, aryl, or alkoxy; and n represents an integer of 0 or more.

Provided are a method of preparing, and use of 1-(2,2-dimethylpropyl)-cyclopropene as an ethylene antagonist that can be formulated as an aqueous emulsion and applicable to plants through immersion or spraying. It was confirmed that the compound can be reliably synthesized and stored by the preparation method disclosed herein, and it was also confirmed that the compound can effectively inhibit ethylene action when formulated as an aqueous emulsion and treated to a plant by immersion or spray treatment; hence, the compound may be used as an ethylene antagonist on plants, as a pre-harvest or post-harvest plant growth regulator, or as a freshness keeping agent.

Provided are a method of preparing, and use of 1-(2,2-dimethylpropyl)-cyclopropene as an ethylene antagonist that can be formulated as an aqueous emulsion and applicable to plants through immersion or spraying. It was confirmed that the compound can be reliably synthesized and stored by the preparation method disclosed herein, and it was also confirmed that the compound can effectively inhibit ethylene action when formulated as an aqueous emulsion and treated to a plant by immersion or spray treatment; hence, the compound may be used as an ethylene antagonist on plants, as a pre-harvest or post-harvest plant growth regulator, or as a freshness keeping agent.

A process for the preparation of a class of molecules, namely bicyclo[1.1.1]pentanes and derivatives thereof by reaction of [1.1.1]propellane with a variety of reagents under irradiation and/or in the presence of radical initiators to obtain bicyclo[1.1.1]pentanes asymmetrically substituted at position 1 and 3, which are useful as intermediates for the preparation of asymmetrically 1,3-disubstituted bicyclo[1.1.1]pentane derivatives and various physiologically active substances or materials containing these structures.

A process for the preparation of a class of molecules, namely bicyclo[1.1.1]pentanes and derivatives thereof by reaction of [1.1.1]propellane with a variety of reagents under irradiation and/or in the presence of radical initiators to obtain bicyclo[1.1.1]pentanes asymmetrically substituted at position 1 and 3, which are useful as intermediates for the preparation of asymmetrically 1,3-disubstituted bicyclo[1.1.1]pentane derivatives and various physiologically active substances or materials containing these structures.

Provided is a method for producing halogenobicyclo[1.1.1]pentane, including a step (a) of reacting 1,1-dibromo-2,2-bis(chloromethyl)cyclopropane with an organometallic reagent in a solvent including acyclic ether having 5 or more carbon atoms to obtain [1.1.1]propellane, and

a step (b) of reacting the obtained [1.1.1]propellane with halogen in a state in which light having a wavelength of 400 nm or less is shielded to obtain halogenobicyclo[1.1.1]pentane.