Mitsubishi Chemical Industries Limited

Takemi Nakanome

Naoshi Imaki

Hajime Mori

Yoshiaki Suzuki

Tetsumi Suzuki

Mitsuhiko Tamura

Haruo Katsumata

A process for preparing 2,3-dihydro-7-aminobenzofurans by reaction between 2,3-dihydro-7-halobenzofurans and ammonia in the presence of a copper catalyst, is described. The 2,3-dihydro-7-aminobenzofurans are useful as intermediates for insecticides.

Process for preparing 2,3-dihydro-7-aminobenzofurans

A process for preparing 2,2-dimethyl-2,3-dihydro-7-hydroxybenzofuran, which comprises

Process for preparing 2,2-dimethyl-2,3-dihydro-7-hydroxybenzofuran

A 2,2-dihalo-6-halo-6-(1-haloisobutyl)cyclohexanone represented by the general formula ##STR1## where each of X.sup.1, X.sup.2, X.sup.3 and X.sup.4 is a halogen atom.

2,2-Dihalo-6-halo-6-(1-haloisobutyl)cyclohexanone

This invention relates to an improved process for producing certain phosphinic acid derivatives of aminothio methyl carbamate by reacting N-(halothio)phosphinic acid amide and a carbamate compound in the presence of a cupric catalyst in high yields. These compounds are known to be useful as insecticides.

Process for preparing phosphinic acid derivatives of aminothio

Hydrocarbons are reacted with a tri-halogenoacetate of the formula ##EQU1## wherein X, Y and Z each represents a halogen atom and M represents a mono valent metal of group Ib to form the corresponding complexes, and then the thus formed complexes are decomposed to selectively separate the desired hydrocarbon components. The used tri-halogenoacetate also is recovered by the decomposition of the complexes.

Method for the separation of hydrocarbons

Hydrocarbons are reacted with a silver tri-halogenomethane sulfonate of the formula ##EQU1## wherein X, Y and Z each represents a halogen atom, to form the corresponding complexes, and then the thus formed complexes are decomposed to selectively separate the desired hydrocarbon components. The used silver tri-halogenomethane sulfonate also is recovered by the decomposition of the complexes.

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Sagamihara, Japan

Takemi Nakanome