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公开(公告)号:DE2247346A1
公开(公告)日:1974-03-28
申请号:DE2247346
申请日:1972-09-27
Applicant: BASF AG
Inventor: MAYER UDO DR , KAST HELLMUT DR
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22.
公开(公告)号:DE2145027A1
公开(公告)日:1973-03-15
申请号:DE2145027
申请日:1971-09-09
Applicant: BASF AG
Inventor: KAST HELLMUT DR
IPC: C07C87/40
Abstract: Cpds. of formula (I) (where R1 and R2 are H, 1-4C alkyl, benzyl, phenylethyl or cyanoethyl) are prepd. by treating cpds. of formula (II) (where X- is an anion) with Lewis acids (pref. AlCl2).
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