31.
    发明专利
    未知

    公开(公告)号:DE3876502D1

    公开(公告)日:1993-01-21

    申请号:DE3876502

    申请日:1988-05-31

    Applicant: BASF AG

    Abstract: Prepn. of N-substd. diaryl iminocarbonates of formula R-N:C(OAr1)(OAr2) (I) comprises (i) reacting a diphenyl iminocarbonate R-N:C(OPh)2 (II) with a substd. phenol Ar1-OH (III) at 50-150 deg.C to give diaryl iminocarbonate R-N:C(OPh)(OAr1) (IV) and (ii) reacting (IV) in situ or after isolation with a substd. phenol Ar2-OH. R is alkyl, aminoalkyl, cycloalkyl, aralkyl, aryl, heterocyclyl or heteroaryl, Ar1, Ar2 are phenyl substd. by 1-5 same or different gps. selected from alkyl, alkoxy, haloalkyl, aryl, CN, NO2 and halogen. If Ar1 and Ar2 are the same. (II) may be reacted directly with at least 2 (pref. 10-20) mols. of (III) to give (I). Also claimed is the prepn. of cpds. (IV) by step (i) above, in which 1-2 mols. (III) are used per mol. (I). Prepn. of cpds. (II) comprises reacting dichlorodiphenoxy methane with RNH2 in a solvent in presence of a base and opt. a catalytic amt. of N,N-dialkylaminopyridine. Cpds. (II) are new where R is tert. alkyl, aminoalkyl, cycloalkyl, heterocyclyl contg. 5-8 ring members and 1 or 2 heteroatoms, heteroaryl contg. 1 or 2 heteroatoms or phenyl substd. by 1-4C alkoxy, haloalkyl, acylimino or methyleneimino. Cpds. (I) are new where Ar1 is Ar2 is phenyl substd. by 1 or 2 halogen, 1-4C alkyl, 1-4C alkoxy or phenyl.

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