55.
    发明专利
    未知

    公开(公告)号:BR8503464A

    公开(公告)日:1986-04-15

    申请号:BR8503464

    申请日:1985-07-22

    Applicant: BASF AG

    Abstract: 5,6-Dihydro-2H-thiopyran-3-carboxaldehydes of the formula where R denotes hydrogen or methyl, are prepared by a method in which acrolein or crotonaldehyde is reacted with hydrogen sulfide in a mineral oil whose boiling point is higher than those of the starting materials and of the end product, and the 5,6-dihydro-2H-thiopyran-3-carboxaldehyde is obtained by distillation. These aldehydes are important intermediates for the preparation of some crop protection agents.

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