83.
    发明专利
    未知

    公开(公告)号:ES2062428T3

    公开(公告)日:1994-12-16

    申请号:ES90400162

    申请日:1990-01-22

    Abstract: Process for the preparation of an optically active 2-chloropropionate ester of formula: R being an optionally substituted hydrocarbyl residue, from an optically active lactate of formula the said process being characterised in that the said lactate (I) is brought into contact with phosgene and a compound chosen from aliphatic amides, aliphatic lactams and aliphatic ureas. Use of the process for the manufacture of intermediates which are useful in the agrochemical industry.

    85.
    发明专利
    未知

    公开(公告)号:DE69002694D1

    公开(公告)日:1993-09-16

    申请号:DE69002694

    申请日:1990-05-29

    Abstract: Process for the preparation of optically active 2-chloropropionic acid esters of formula … … COOR1 being a hydrolysable group from an optically active lactate of formula … … with inversion of configuration by bringing the lactate (II) into contact with SOCl2 followed by decomposition of the chlorosulphite formed, the said process being characterised in that at least the decomposition stage is carried out in the presence of ether.

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